trianglen.

Brit.

/ˈtrʌɪaŋɡl/,

/ˈtrʌɪəŋɡl/, U.S.

/ˈtraɪˌæŋɡ(ə)l/

Forms: Also Middle English triangyl, tryangyl, Middle English–1600s tryangle, 1500s triangil, tryanghel, 1500s–1600s triangill; Middle English–1500s treangle, 1500s treeangle, treangell.

Etymology: < French triangle (13th cent. in Godefroy Compl.), or < its source, Latin triangulum , noun neuter < triangulus adjective, three-cornered, < tri- , tri- comb. form + angulus angle n.¹ N.E.D. (1914) gives the pronunciation as (trəi·æŋg'l, trəiˌæ·ŋg'l) /ˈtraɪæŋɡ(ə)l/, /traɪˈæŋɡ(ə)l/.

a. Geometry, etc. A figure (usually, a plane rectilineal figure) having three angles and three sides.In modern geometry a triangle is regarded as a system of three points not collinear, together with the three straight lines joining them; or as a system of three straight lines each intersecting the two others at different points. circular triangle, a plane triangle formed by three intersecting circular arcs. spherical triangle, a triangle formed by three arcs upon the surface of a sphere: see spherical adj. and n. triangle of forces, the theorem in statics that if three forces in one plane, acting at one point, be in equilibrium, three straight lines in that plane parallel to their directions will form a triangle whose sides are proportional to their magnitudes.

ΘΚΠ

the world > space > shape > angularity > specific angular shape > [noun] > triangle

triangle1398

triquetra1586

trigon1600

trilateral1766

the world > relative properties > number > geometry > shape or figure > [noun] > two-dimensional > triangle

triangle1398

trigon1600

triquetra1706

trilateral1766

trilineal1807

1398 J. Trevisa tr. Bartholomew de Glanville De Proprietatibus Rerum (Tollem. MS) xvii. cviii, Some [nuts] ben distinguid in þe cop as it were with þe schap of a triangle [L. per formam trianguli].

c1400 Lanfranc's Cirurg. 258 Þe nose is maad of .ij. boones in þe maner of a triangle in þis manner. ∆∆.

1551 R. Record Pathway to Knowl. i. Defin. A triangle is nothinge els to say, but a figure of three corners.

1560 J. Daus tr. J. Sleidane Commentaries f. cccclj Betwyxt Caleis, Arde and Grauelyn, Townes..set as it were a treangle.

1646 Sir T. Browne Pseudodoxia Epidemica 25 In every triangle, two sides which soever be taken are greater then the side remaining.

1781 E. Gibbon Decline & Fall II. xvii. 3 The figure of the imperial city [Constantinople] may be represented under that of an unequal triangle.

1885 C. Leudesdorf tr. L. Cremona Elements Projective Geom. 145 A series of theorems..relating to the inscribed pentagon, quadrangle, and triangle..a series of correlative theorems relating to the circumscribed pentagon, quadrilateral, and triangle.

b. A figure of this form used symbolically (e.g. an equilateral triangle as a symbol of the Trinity), or in magic or necromancy. In Heraldry a figure of this form as a bearing; in triangle, said of three or more bearings arranged in the form of a triangle.

ΘΚΠ

the world > the supernatural > the occult > sorcery, witchcraft, or magic > [noun] > sign or symbol used in

characta1393

character1449

circle1529

triangle1584

post-writing1621

magic circle1654

sigil1659

hag track1836

society > communication > indication > insignia > heraldic devices collective > charge: device on shield > [phrase] > manner or type of charge

in point1562

in orle1572

in pale1572

in bend1598

in lozengea1695

in triangle1766

in pile1864

society > faith > artefacts > symbol (general) > Christian symbols or images > [noun] > representing the Trinity

trinity1496

triangle1810

society > communication > indication > insignia > heraldic devices collective > other heraldic representations > [noun] > triangle

trianglec1828

1584 R. Scot Discouerie Witchcraft xv. ii. 387 He is a lier, except he be brought into a triangle, and there he speaketh diuinelie.

1766 ‘M. A. Porny’ Elem. Heraldry (1787) 175 Azure, three Trouts fretty in Triangle Argent.

1810 R. Southey Curse of Kehama xix. 209 The sacred Triangle..Holding the Emblem which no tongue may tell.

c1828 W. Berry Encycl. Her. I. Gloss. Triangle, this sometimes occurs as a bearing in coat-armour. See Cross of Triangles, or twelve triangles in cross.

1864 C. Boutell Heraldry Hist. & Pop. (ed. 3) xix. §5. 311 A nail in every point thereof, in triangle.

1894 Parker's Gloss. Heraldry (at cited word) Charges may be described as fretted in triangle, e.g. in the arms of Troutbeck (under Salmon)... The insignia of the Isle of Man are sometimes blazoned as flexed in triangle.

c. figurative. A group or set of three, a triad. Esp. a love-relationship in which one member of a married couple is involved with a third party; frequently as eternal triangle.

ΘΚΠ

the world > relative properties > number > specific numbers > three > group of three > [noun]

leashc1330

ternarya1464

trinity1542

three?1544

triad1546

trine1554

triplicity1585

ternion1587

pair royal1592

trinary1596

trias1610

gleek1615

triangle1621

triple1653

triumvirate1655

prial1776

trio1777

trefoil1826

trinomy1838

Pip, Squeak, and Wilfred1937

society > morality > moral evil > licentiousness > unchastity > fornication, adultery, or incest > [noun] > adultery > relationship where adultery exists

eternal triangle1919

1621 T. W. tr. S. Goulart Wise Vieillard xv. 129 In this sacred triangle is included the renouncing of our selues.

1659 N. Whiting (title) Old Jacob's altar, newly repaired; or, the saints triangle of dangers, deliverances, and duties.

1907 Daily Chron. 5 Dec. 3/4 Mrs. Dudeney's novel..deals with the eternal triangle, which, in this case, consists of two men and one woman.

1917 R. Kipling Diversity of Creatures 358 The couples had rearranged themselves or were re-crystallizing in fresh triangles.

1919 G. B. Shaw in F. Harris Contemp. Portraits 2nd Ser. 332 For the modern drama, with its eternal triangle and so forth, he claims nothing, but that it proves adultery to be the dullest of subjects.

1938 H. G. Wells Apropos of Dolores iv. 162 He was much more substantial than in the days of our romantic triangle.

1955 H. Kurnitz Invasion of Privacy (1956) vi. 48 The details of the story, the way the husband and wife first met..the other woman in the triangle.

1963 A. Heron Towards Quaker View of Sex iv. 39 Most examples of the ‘eternal triangle’ are produced by boredom and primitive misconduct.

1979 J. Philips Why Murder? (1980) ii. ii. 90 A husband, a wife, a lover—the classic triangle.

d. North Atlantic Triangle: see North Atlantic n. 3.

(a) Something having the form of a triangle; any three-cornered body, object, or space.

ΘΚΠ

the world > space > shape > angularity > specific angular shape > [noun] > triangle > triangular object or formation

pyramid1589

triangle1615

heater1797

1615 J. Sylvester tr. P. Matthieu Memorials of Mortalitie in 2nd Session Parl. Vertues Reall 152 Th' Earth cannot fill thy hearts vnequal Angles; Thy Hearts a Triangle, the Earth's a Round.

1788 E. Gibbon Decline & Fall (1846) V. l. 2 The Arabian peninsula may be conceived as a triangle of spacious but irregular dimensions.

1791 ‘T. Newte’ Prospects & Observ. Tour 120 The present fort, which is a triangle, has two bastions.

1843 T. Carlyle Past & Present ii. i. 53 In what wig and black triangle dost thou walk abroad?

1847 L. H. Kerr tr. L. von Ranke Hist. Servia i. 13 The Servians..in the first half of the 14th century..formed the strongest power of the Illyrian triangle.

1895 R. W. Chambers Demoiselle D'Ys in King in Yellow i A long wavering triangle of water-fowl drifted southward over our heads.

(b) the Devil's Triangle: a name given to an area of sea between Bermuda and Florida credited with a high number of unexplained disappearances of boats and aircraft; = Bermuda Triangle n.; hence used allusively; the golden triangle, an area at the meeting-point of Burma (Myanmar), Laos, and Thailand, where much opium is grown.

ΘΚΠ

the world > the earth > named regions of earth > Far East > [noun]

the High Levant1497

Far East1852

Farther East1876

Near North1935

the golden triangle1973

the world > physical sensation > sight and vision > invisibility > [noun] > vanishing or disappearing > place credited with disappearances

black hole1941

Bermuda Triangle1964

the Devil's Triangle1973

1973 Bangkok Post 22 Apr. 1 Both the opium and the morphine base almost certainly originated in the so-called ‘golden triangle’ where the opium poppy grows in abundance.

1975 Collier's Encycl. Year Bk. 1976 161 The Atlantic region known as the Bermuda, or Devil's, Triangle.

1978 Times 23 Jan. 2/6 The increasing importance of South-East Asia's ‘golden triangle’ as a source of narcotics.

1983 Times 12 Feb. 4/8 Drugs from the Golden Triangle were in heavy demand in Europe before 1979.

ΚΠ

1927 W. E. Collinson Contemp. Eng. 84 The wet triangle.

b. *natural objects. Palmistry. A triangular figure made by three of the lines of the hand: see quot. 1653.

ΚΠ

c1460 J. Metham Wks. (1916) 86 A tryangyl that ys off one length, evyn on alle partys..betokynnyth bodyly strengh and bold off herte.

c1460 J. Metham Wks. (1916) 86 The fyrste lyne ys the fyrst parte off the tryangyl, and yt gothe aboute the hylle of the thombe.

1653 R. Saunders Physiognomie i. 58 This Triangle..is made in the hand, by..three Lines, viz. that of Life, the middle natural Line, and that of the Head.

c. Astronomy. (With capital initial.) The constellation Triangulum, north of Aries, characterized by three stars in the positions of the angular points of an isosceles triangle.Also, Triangulum minus, the Lesser Triangle, a constellation immediately south of this, introduced by Hevelius in 1690, but now disused; Triangulum australe, the Southern Triangle, a modern constellation near the South Pole.

ΘΚΠ

the world > the universe > constellation > Northern constellations > [noun] > Triangulum

triangle1556

delta1638

1556 R. Record Castle of Knowl. 265 By hir [Andromeda's] lefte foot is ther a small constellation..commonly called the Triangle.

1868 W. Lockyer & J. N. Lockyer tr. A. Guillemin Heavens (ed. 3) 334 The Altar and the Southern Triangle, which lie along the Milky Way in looking towards the pole.

d. Anatomy. Applied, with defining words, to the triangular areas bounded by certain muscles: as triangles of the neck, anterior triangle (subdivided into the submaxillary triangle and the superior triangle and inferior carotid triangles) and posterior triangle (subdivided into the occipital triangle and subclavian triangles); triangle of Petit, above the crest of the ilium; Scarpa's triangle, in the upper part of the thigh.

ΚΠ

1846 F. Brittan tr. J. F. Malgaigne Man. Operative Surg. 147 The inferior triangle of the popliteal space is bounded on each side by the heads of the gastrocnemius.

1876 Clin. Soc. Trans. 9 41 I removed all the enlarged glands in front of the sterno-mastoid, and thus cleared the anterior triangle of the neck.

1897 T. C. Allbutt et al. Syst. Med. IV. 418 [An abscess] may open superficially in the loin through the triangle of Petit.

e. Entomology. A triangular marking or space on an insect's wing.

ΚΠ

1832 [see triangle-marked adj. at Compounds 1c].

1891 Cent. Dict. Triangle... In entom. a large three-sided cell found in the wings of many dragonflies..often called the discoidal triangle, to distinguish it from the internal triangle, which adjoins it on the inner side, and the anal triangle, which lies close to the anal border of the wing.

f. A species of box-fish of triangular form, as Ostracion trigonum.

** artificial objects.

g. A small ornament or piece of jewellery of a triangular form.

ΘΚΠ

the mind > attention and judgement > beautification > types of ornamentation > jewellery > jewellery of specific shape or form > [noun]

ringOE

beec1009

languet1378

Collar of SS., S's, or Esses1406

tablet?a1425

fetterlock1463

serpent-tongue1488

triangle1529

flory1530

gorget1570

medal1578

tablet jewel1599

sprig1602

bracelet1624

medallion1658

croisette1688

torques1693

scarabaeus1775

crosslet1802

torque1834

teardrop1870

scarab1878

scaraboid1879

scarabaeoid1887

squash blossom1923

clip1937

1529 Will of Eell Leigh (P.R.O.: PROB. 11/23) f. 82 My corsse gurdell w^t the Treeangle of flowres of silver and golde.

1531 in H. Littlehales Medieval Rec. London City Church (1905) 48 A demysent [girdle] with..a pendantte a treangell of selver and gelt.

1538 Will of William Mores (P.R.O.: PROB. 11/22) f. 318^v A triangill of siluer and gilte.

1632 J. Hayward tr. G. F. Biondi Eromena 120 This Iewell..a triangle of three rich diamonds, each angle..enriched with a great pearle.

†h. Christian Church. A stand or frame on which copes were hung up. Obsolete.

ΘΚΠ

society > faith > artefacts > furniture > other furniture > [noun] > cope-stand

triangle1532

1532 in Archaeologia Cantiana (1872) 8 124 Item a treangle for copys, a presse [Editor's Note, a crane or stand for hanging copes].

1538 Inventories Relig. Houses in Archaeologia (1871) 43 226 ij chestes and the tryangle for the same ornaments to be hengyd.

1849 D. Rock Church our Fathers II. vi. 43 [A doubtful statement].

†i. (More fully triangle virginal), an early kind of keyboard stringed instrument. Obsolete.

ΘΚΠ

society > leisure > the arts > music > musical instrument > keyboard instrument > stringed keyboards > [noun] > virginals

virginal1530

a pair of virginals1542

virginal1566

triangle1663

virginet?c1680

muselar1965

1661 S. Pepys Diary 14 June (1970) II. 121 I sent to my house, by my Lord's order, his shipp and Triangle virginall.]

1663 S. Pepys Diary 18 Mar. (1971) IV. 79 This day, my Tryangle (which was put in tune yesterday) did please me very well.

j. A musical instrument of percussion, consisting of a steel rod bent into a triangular form, but open at one corner; it is struck with a small straight steel rod. Also transferred = triangler n.

ΘΚΠ

society > leisure > the arts > music > musical instrument > percussion instrument > [noun] > triangle

triangle1786

1786 T. Busby Compl. Dict. Music Triangle, a steel instrument so called from its consisting of three bars of polished steel, so united at their ends as to produce a triangular frame.

1811 Countess Granville Lett. (1894) I. 21 We play upon the..guitar, triangle, and castagnettes.

1878 F. Hueffer in G. Grove Dict. Music I. 28/1 He is said to have accepted the appointment of supernumerary triangle at the Gymnase.

1913 Times 14 May 8/5 The only percussion (even the usual drums are excluded) consists of triangle and cymbals.

k. Name for a kind of large tripod composed of three poles or spars joined at the top, bearing a pulley for hoisting heavy weights, or for weighing: see also quot. 1867.

ΘΚΠ

society > occupation and work > equipment > lifting or hoisting equipment > [noun] > shear-legs or gin

gin1398

lading gin1497

raising gin1497

shearsa1625

Jack1686

triangle1691

crab1739

shear-legs1860

1691 J. Evelyn Kalendarium Hortense (ed. 8) 63 If the Tree be too ponderous to be lifted perpendicular by the Hand alone, by applying a Triangle and Pully..draw out the Tree.

1707 J. Mortimer Whole Art Husbandry (1721) I. 187 Set up three Poles (like unto a Triangle wherewith they usually weigh heavy Ware) spreading at the Bottom.

1867 W. H. Smyth & E. Belcher Sailor's Word-bk. Triangle,..a machine formed by spars for lifting weights, water-casks, &c. Also, a stage hung round a mast, to scrape, paint, or grease it.

1873 5th Rep. Deputy Keeper Public Rec. Ireland 26 in Parl. Papers (C. 760) XXXV. ii. 335 The Records were lowered through the aperture in the centre of the floor by means of a rope, supported by a triangle raised over the opening.

l. Military. (Usually plural) A tripod, originally formed of three halberds stuck in the ground and joined at the top, to which soldiers were formerly bound to be flogged; a structure resembling this.

ΘΚΠ

society > authority > punishment > corporal punishment > instrument or place of corporal punishment > [noun] > whipping-post or tripod

pillara1475

rogue stob1550

post1555

whipping-post1600

whipping-stock1615

fork1619

whipstock1619

flogging-stake1785

flogging-block1827

triangle1847

whipping-pole1862

1796 Grose's Classical Dict. Vulgar Tongue (ed. 3) at Halbert Soldiers of the infantry, when flogged, being commonly tied to three halberts, set up in a triangle, with a fourth fastened across them.]

1847 in Webster's Amer. Dict. Eng. Lang.

1853 J. H. Stocqueler Mil. Encycl. 290/1 Triangles, a wooden instrument consisting of three poles so fastened at top that they may spread at bottom in a triangular form... An iron bar, breast high, goes across one side of the triangle. The triangles were used in some regiments for..inflicting military punishments.

1871 G. A. Lawrence Anteros (1872) i. 11 He was unsparing both of his tongue and of the lash—the triangles were an honoured institution in those days.

1897 ‘P. Warung’ Tales Old Regime 29 Already, at Molong [Australia], there is one military-post and a triangles, and at Wellington Valley there is another military-post and another triangles.

m. Pottery. A triangular piece of baked ware, with points projecting from the angles, placed between pieces of biscuit ware to prevent their adhering to each other when baking.

ΚΠ

1875 E. H. Knight Amer. Mech. Dict. III. 2626/2 Triangle,..4. (Pottery.) A small piece of pottery, placed between pieces of biscuit ware in the seggar, to prevent the adherence of the pieces when fired.

n. Angling. A set of three hooks fastened together so that their barbs are at the angular points of a triangle.

ΘΚΠ

the world > food and drink > hunting > fishing > fishing-tackle > hook > [noun] > hooks fastened together

snap-hook1688

snapper1688

springer1688

jigger1815

snap1839

dree-draw1850

stroke-haul1850

triangle1867

gang1879

black doctor1883

murderer1883

trap-hook1883

treble hook1895

treble1897

1867 F. Francis Bk. Angling iv. 97 I had used a single set of small brazed triangles.

1904 W. M. Gallichan Fishing & Trav. Spain 145 The flying triangles are to blame. It is not often that one loses a fish hooked on the tail triangle.

o. A drawing-instrument in the form of a right-angled triangle of wood, vulcanite, etc.; a set square.

ΘΚΠ

society > communication > representation > a plastic or graphic representation > graphic representation > drawing plans or diagrams > [noun] > drawing instruments > triangular

set square1854

triangle1875

1875 E. H. Knight Amer. Mech. Dict. III. 2626/2 Triangle,.. 2. (Drafting.) A three-cornered straight-edge, used..for drawing parallel, perpendicular, or diagonal lines. It has one right angle, the two others being each of 45°.., or one of 30° and the other of 60°.

p. A triangular warning sign placed on the road to mark the presence of a broken-down vehicle or vehicles.

ΘΚΠ

society > travel > transport > transport or conveyance in a vehicle > vehicular traffic > [noun] > traffic control > sign warning of broken-down vehicle

triangle1969

1969 B. Weil Dossier IX ii. 8 There's your red break~down triangle... They're obligatory in France.

1971 H. Pacy Road Accidents i. 33 Utilize the special warning triangles larger trucks carry for this purpose.

1977 ‘J. Fraser’ Hearts Ease in Death ii. 12 Superintendent Bill Aveyard braked his car when he saw the flashing torches and warning triangles at the side of the road.

3. Collectors' name for certain moths. See also Compounds 2.

ΚΠ

1832 J. Rennie Conspectus Butterflies & Moths Brit. 55 The Triangle (Gr[aphiphora] Triangulum, Ochsenheimer) appears the end of July.

1832 J. Rennie Conspectus Butterflies & Moths Brit. 164 The Triangle (P[seudotamia] trigonana, Stephens). Near London.

Compounds

C1. General attributive.

a. (In sense 1c.)

triangle drama n.

ΘΚΠ

society > leisure > the arts > performance arts > drama > a play > [noun] > other types of play

king play1469

king game1504

historya1509

chronicle history1600

monology1608

horseplaya1627

piscatory1631

stock play1708

petite pièce1712

mimic1724

ballad opera1730

ballad farce1735

benefit-play1740

potboiler1783

monodrama1793

extravaganza1797

theo-drama1801

monodrame1803

proverb1803

stock piece1804

bespeak1807

ticket-night1812

dramaticle1813

monopolylogue1819

pièce d'occasion1830

interlude1831

mimea1834

costume piece1834

mummers' play1849

history play1850

gag-piece1860

music drama1874

well-made1881

playlet1884

two-decker1884

slum1885

kinderspiel1886

thrill1886

knockabout1887

two-hander1888

front-piece1889

thriller1889

shadow-play1890

mime play1894

problem play1894

one-acter1895

sex play1899

chronicle drama1902

thesis-play1902

star vehicle1904

folk-play1905

radio play1908

tab1915

spy play1919

one-act1920

pièce à thèse1923

dance-drama1924

a mess of plottage1926

turkey1927

weepie1928

musical1930

cliffhanger1931

mime drama1931

triangle drama1931

weeper1934

spine-chiller1940

starrer1941

scorcher1942

teleplay1947

straw-hatter1949

pièce noire1951

pièce rose1951

tab show1951

conversation piece1952

psychodrama1956

whydunit1968

mystery play1975

State of the Nation1980

1931 E. A. Robertson Four Frightened People i. 22 Just another triangle drama.

1961 Times 13 May 5/2 In an all too successful attempt to turn Shakespeare's tragedy into a conventional triangle-drama, Rossini's librettist, Berio, built up Rodrigo.

b. (In sense 2j.)

triangle-player n.

ΘΚΠ

society > leisure > the arts > music > musician > instrumentalist > percussion player > [noun] > triangle-player

triangler1840

triangle-player1906

1906 J. Joyce Let. 4 Oct. (1966) II. 170 AE ought now to write some..dreamy thing about a..Triangle-player.

1971 D. E. Westlake I gave at Office 24 Arnold dropped an occasional word in, like the triangle player at the Philharmonic.

triangle-marked adj.

ΚΠ

1832 J. Rennie Conspectus Butterflies & Moths Brit. 228 The Triangle-marked Purple (G[racillaria] purpurea, Haworth). Wings..purple, with a three-cornered central halfband... The Triangle-marked Red (G. stigmatella, Stephens)... The Triangle Marked Buff (G. ochracea, Haworth).

C2.

triangle inequality n. Mathematics the statement that the modulus of the sum of two quantities is less than or equal to the sum of their moduli; (so called from the analogy with the distances between the vertices of a triangle).

ΘΚΠ

the world > relative properties > number > algebra > [noun] > expression > inequality

inequation1855

inequality1875

Minkowski inequality1932

triangle inequality1941

Cauchy–Schwarz inequality1956

ultrametric inequality1967

1941 G. Birkhoff & S. MacLane Surv. Mod. Algebra vii. 183 In any Euclidian vector space, length has the following properties:..|ξ + η| ≦ |ξ| + |η| (the triangle inequality).

1972 M. Kline Math. Thought xlvi. 1083 Schwarz's inequality and the triangle inequality are proved for the norm.

triangle moth n. Limacodes asellus.

triangle-ways adv. rare = trianglewise adv.

ΘΚΠ

the world > space > shape > angularity > specific angular shape > [adverb] > triangle

triangle1474

trianglewise?1523

three-corneredwise1580

triangularly1604

triangle-ways1689

triangular-wise1707

three-corner-ways1748

three-corner-wise1862

1689 London Gaz. No. 2485/4 16 silver Trencher-Plates..marked with a Cypher triangle-ways.

Draft additions 1993

Snooker, etc. The triangular wooden frame used in setting up the balls before the start of play. Cf. frame n. 10.

ΘΚΠ

society > leisure > entertainment > pastimes > game > billiards, pool, or snooker > [noun] > wooden frame used for setting up balls

triangle1890

rack1896

1890 C. C. Moore Games of Pool xii. 79 These balls are placed in the form of a triangle upon the table, as in Pyramids, a wooden frame or ‘triangle’ being employed to save trouble and insure correctness.

1907 Yesterday's Shopping (1969) 1025/2 Billiard accessories... Triangle..each 4/6.

1954 Billiards & Snooker (‘Know the Game’ Ser.) 23 A triangular wooden frame, the ‘triangle’, enables the reds to be set up as shown.

1983 Harrods Mag. Christmas 168 Snooker..tables..complete with two cues, balls, triangle, chalk and scoreboard.

This entry has not yet been fully updated (first published 1914; most recently modified version published online March 2022).

单词	triangle
释义	trianglen. Brit. /ˈtrʌɪaŋɡl/, /ˈtrʌɪəŋɡl/, U.S. /ˈtraɪˌæŋɡ(ə)l/ Forms: Also Middle English triangyl, tryangyl, Middle English–1600s tryangle, 1500s triangil, tryanghel, 1500s–1600s triangill; Middle English–1500s treangle, 1500s treeangle, treangell. Etymology: < French triangle (13th cent. in Godefroy Compl.), or < its source, Latin triangulum , noun neuter < triangulus adjective, three-cornered, < tri- , tri- comb. form + angulus angle n.¹ N.E.D. (1914) gives the pronunciation as (trəi·æŋg'l, trəiˌæ·ŋg'l) /ˈtraɪæŋɡ(ə)l/, /traɪˈæŋɡ(ə)l/. 1. a. Geometry, etc. A figure (usually, a plane rectilineal figure) having three angles and three sides.In modern geometry a triangle is regarded as a system of three points not collinear, together with the three straight lines joining them; or as a system of three straight lines each intersecting the two others at different points. circular triangle, a plane triangle formed by three intersecting circular arcs. spherical triangle, a triangle formed by three arcs upon the surface of a sphere: see spherical adj. and n. triangle of forces, the theorem in statics that if three forces in one plane, acting at one point, be in equilibrium, three straight lines in that plane parallel to their directions will form a triangle whose sides are proportional to their magnitudes. ΘΚΠ the world > space > shape > angularity > specific angular shape > [noun] > triangle triangle1398 triquetra1586 trigon1600 trilateral1766 the world > relative properties > number > geometry > shape or figure > [noun] > two-dimensional > triangle triangle1398 trigon1600 triquetra1706 trilateral1766 trilineal1807 1398 J. Trevisa tr. Bartholomew de Glanville De Proprietatibus Rerum (Tollem. MS) xvii. cviii, Some [nuts] ben distinguid in þe cop as it were with þe schap of a triangle [L. per formam trianguli]. c1400 Lanfranc's Cirurg. 258 Þe nose is maad of .ij. boones in þe maner of a triangle in þis manner. ∆∆. 1551 R. Record Pathway to Knowl. i. Defin. A triangle is nothinge els to say, but a figure of three corners. 1560 J. Daus tr. J. Sleidane Commentaries f. cccclj Betwyxt Caleis, Arde and Grauelyn, Townes..set as it were a treangle. 1646 Sir T. Browne Pseudodoxia Epidemica 25 In every triangle, two sides which soever be taken are greater then the side remaining. View more context for this quotation 1781 E. Gibbon Decline & Fall II. xvii. 3 The figure of the imperial city [Constantinople] may be represented under that of an unequal triangle. 1885 C. Leudesdorf tr. L. Cremona Elements Projective Geom. 145 A series of theorems..relating to the inscribed pentagon, quadrangle, and triangle..a series of correlative theorems relating to the circumscribed pentagon, quadrilateral, and triangle. b. A figure of this form used symbolically (e.g. an equilateral triangle as a symbol of the Trinity), or in magic or necromancy. In Heraldry a figure of this form as a bearing; in triangle, said of three or more bearings arranged in the form of a triangle. ΘΚΠ the world > the supernatural > the occult > sorcery, witchcraft, or magic > [noun] > sign or symbol used in characta1393 character1449 circle1529 triangle1584 post-writing1621 magic circle1654 sigil1659 hag track1836 society > communication > indication > insignia > heraldic devices collective > charge: device on shield > [phrase] > manner or type of charge in point1562 in orle1572 in pale1572 in bend1598 in lozengea1695 in triangle1766 in pile1864 society > faith > artefacts > symbol (general) > Christian symbols or images > [noun] > representing the Trinity trinity1496 triangle1810 society > communication > indication > insignia > heraldic devices collective > other heraldic representations > [noun] > triangle trianglec1828 1584 R. Scot Discouerie Witchcraft xv. ii. 387 He is a lier, except he be brought into a triangle, and there he speaketh diuinelie. 1766 ‘M. A. Porny’ Elem. Heraldry (1787) 175 Azure, three Trouts fretty in Triangle Argent. 1810 R. Southey Curse of Kehama xix. 209 The sacred Triangle..Holding the Emblem which no tongue may tell. c1828 W. Berry Encycl. Her. I. Gloss. Triangle, this sometimes occurs as a bearing in coat-armour. See Cross of Triangles, or twelve triangles in cross. 1864 C. Boutell Heraldry Hist. & Pop. (ed. 3) xix. §5. 311 A nail in every point thereof, in triangle. 1894 Parker's Gloss. Heraldry (at cited word) Charges may be described as fretted in triangle, e.g. in the arms of Troutbeck (under Salmon)... The insignia of the Isle of Man are sometimes blazoned as flexed in triangle. c. figurative. A group or set of three, a triad. Esp. a love-relationship in which one member of a married couple is involved with a third party; frequently as eternal triangle. ΘΚΠ the world > relative properties > number > specific numbers > three > group of three > [noun] leashc1330 ternarya1464 trinity1542 three?1544 triad1546 trine1554 triplicity1585 ternion1587 pair royal1592 trinary1596 trias1610 gleek1615 triangle1621 triple1653 triumvirate1655 prial1776 trio1777 trefoil1826 trinomy1838 Pip, Squeak, and Wilfred1937 society > morality > moral evil > licentiousness > unchastity > fornication, adultery, or incest > [noun] > adultery > relationship where adultery exists eternal triangle1919 1621 T. W. tr. S. Goulart Wise Vieillard xv. 129 In this sacred triangle is included the renouncing of our selues. 1659 N. Whiting (title) Old Jacob's altar, newly repaired; or, the saints triangle of dangers, deliverances, and duties. 1907 Daily Chron. 5 Dec. 3/4 Mrs. Dudeney's novel..deals with the eternal triangle, which, in this case, consists of two men and one woman. 1917 R. Kipling Diversity of Creatures 358 The couples had rearranged themselves or were re-crystallizing in fresh triangles. 1919 G. B. Shaw in F. Harris Contemp. Portraits 2nd Ser. 332 For the modern drama, with its eternal triangle and so forth, he claims nothing, but that it proves adultery to be the dullest of subjects. 1938 H. G. Wells Apropos of Dolores iv. 162 He was much more substantial than in the days of our romantic triangle. 1955 H. Kurnitz Invasion of Privacy (1956) vi. 48 The details of the story, the way the husband and wife first met..the other woman in the triangle. 1963 A. Heron Towards Quaker View of Sex iv. 39 Most examples of the ‘eternal triangle’ are produced by boredom and primitive misconduct. 1979 J. Philips Why Murder? (1980) ii. ii. 90 A husband, a wife, a lover—the classic triangle. d. North Atlantic Triangle: see North Atlantic n. 3. 2. a. (a) Something having the form of a triangle; any three-cornered body, object, or space. ΘΚΠ the world > space > shape > angularity > specific angular shape > [noun] > triangle > triangular object or formation pyramid1589 triangle1615 heater1797 1615 J. Sylvester tr. P. Matthieu Memorials of Mortalitie in 2nd Session Parl. Vertues Reall 152 Th' Earth cannot fill thy hearts vnequal Angles; Thy Hearts a Triangle, the Earth's a Round. 1788 E. Gibbon Decline & Fall (1846) V. l. 2 The Arabian peninsula may be conceived as a triangle of spacious but irregular dimensions. 1791 ‘T. Newte’ Prospects & Observ. Tour 120 The present fort, which is a triangle, has two bastions. 1843 T. Carlyle Past & Present ii. i. 53 In what wig and black triangle dost thou walk abroad? 1847 L. H. Kerr tr. L. von Ranke Hist. Servia i. 13 The Servians..in the first half of the 14th century..formed the strongest power of the Illyrian triangle. 1895 R. W. Chambers Demoiselle D'Ys in King in Yellow i A long wavering triangle of water-fowl drifted southward over our heads. (b) the Devil's Triangle: a name given to an area of sea between Bermuda and Florida credited with a high number of unexplained disappearances of boats and aircraft; = Bermuda Triangle n.; hence used allusively; the golden triangle, an area at the meeting-point of Burma (Myanmar), Laos, and Thailand, where much opium is grown. ΘΚΠ the world > the earth > named regions of earth > Far East > [noun] the High Levant1497 Far East1852 Farther East1876 Near North1935 the golden triangle1973 the world > physical sensation > sight and vision > invisibility > [noun] > vanishing or disappearing > place credited with disappearances black hole1941 Bermuda Triangle1964 the Devil's Triangle1973 1973 Bangkok Post 22 Apr. 1 Both the opium and the morphine base almost certainly originated in the so-called ‘golden triangle’ where the opium poppy grows in abundance. 1975 Collier's Encycl. Year Bk. 1976 161 The Atlantic region known as the Bermuda, or Devil's, Triangle. 1978 Times 23 Jan. 2/6 The increasing importance of South-East Asia's ‘golden triangle’ as a source of narcotics. 1983 Times 12 Feb. 4/8 Drugs from the Golden Triangle were in heavy demand in Europe before 1979. (c) the wet triangle [= German nasses dreieck] the German part of the North Sea. ΚΠ 1927 W. E. Collinson Contemp. Eng. 84 The wet triangle. b. *natural objects. Palmistry. A triangular figure made by three of the lines of the hand: see quot. 1653. ΚΠ c1460 J. Metham Wks. (1916) 86 A tryangyl that ys off one length, evyn on alle partys..betokynnyth bodyly strengh and bold off herte. c1460 J. Metham Wks. (1916) 86 The fyrste lyne ys the fyrst parte off the tryangyl, and yt gothe aboute the hylle of the thombe. 1653 R. Saunders Physiognomie i. 58 This Triangle..is made in the hand, by..three Lines, viz. that of Life, the middle natural Line, and that of the Head. c. Astronomy. (With capital initial.) The constellation Triangulum, north of Aries, characterized by three stars in the positions of the angular points of an isosceles triangle.Also, Triangulum minus, the Lesser Triangle, a constellation immediately south of this, introduced by Hevelius in 1690, but now disused; Triangulum australe, the Southern Triangle, a modern constellation near the South Pole. ΘΚΠ the world > the universe > constellation > Northern constellations > [noun] > Triangulum triangle1556 delta1638 1556 R. Record Castle of Knowl. 265 By hir [Andromeda's] lefte foot is ther a small constellation..commonly called the Triangle. 1868 W. Lockyer & J. N. Lockyer tr. A. Guillemin Heavens (ed. 3) 334 The Altar and the Southern Triangle, which lie along the Milky Way in looking towards the pole. d. Anatomy. Applied, with defining words, to the triangular areas bounded by certain muscles: as triangles of the neck, anterior triangle (subdivided into the submaxillary triangle and the superior triangle and inferior carotid triangles) and posterior triangle (subdivided into the occipital triangle and subclavian triangles); triangle of Petit, above the crest of the ilium; Scarpa's triangle, in the upper part of the thigh. ΚΠ 1846 F. Brittan tr. J. F. Malgaigne Man. Operative Surg. 147 The inferior triangle of the popliteal space is bounded on each side by the heads of the gastrocnemius. 1876 Clin. Soc. Trans. 9 41 I removed all the enlarged glands in front of the sterno-mastoid, and thus cleared the anterior triangle of the neck. 1897 T. C. Allbutt et al. Syst. Med. IV. 418 [An abscess] may open superficially in the loin through the triangle of Petit. e. Entomology. A triangular marking or space on an insect's wing. ΚΠ 1832 [see triangle-marked adj. at Compounds 1c]. 1891 Cent. Dict. Triangle... In entom. a large three-sided cell found in the wings of many dragonflies..often called the discoidal triangle, to distinguish it from the internal triangle, which adjoins it on the inner side, and the anal triangle, which lies close to the anal border of the wing. f. A species of box-fish of triangular form, as Ostracion trigonum. ** artificial objects. g. A small ornament or piece of jewellery of a triangular form. ΘΚΠ the mind > attention and judgement > beautification > types of ornamentation > jewellery > jewellery of specific shape or form > [noun] ringOE beec1009 languet1378 Collar of SS., S's, or Esses1406 tablet?a1425 fetterlock1463 serpent-tongue1488 triangle1529 flory1530 gorget1570 medal1578 tablet jewel1599 sprig1602 bracelet1624 medallion1658 croisette1688 torques1693 scarabaeus1775 crosslet1802 torque1834 teardrop1870 scarab1878 scaraboid1879 scarabaeoid1887 squash blossom1923 clip1937 1529 Will of Eell Leigh (P.R.O.: PROB. 11/23) f. 82 My corsse gurdell w^t the Treeangle of flowres of silver and golde. 1531 in H. Littlehales Medieval Rec. London City Church (1905) 48 A demysent [girdle] with..a pendantte a treangell of selver and gelt. 1538 Will of William Mores (P.R.O.: PROB. 11/22) f. 318^v A triangill of siluer and gilte. 1632 J. Hayward tr. G. F. Biondi Eromena 120 This Iewell..a triangle of three rich diamonds, each angle..enriched with a great pearle. †h. Christian Church. A stand or frame on which copes were hung up. Obsolete. ΘΚΠ society > faith > artefacts > furniture > other furniture > [noun] > cope-stand triangle1532 1532 in Archaeologia Cantiana (1872) 8 124 Item a treangle for copys, a presse [Editor's Note, a crane or stand for hanging copes]. 1538 Inventories Relig. Houses in Archaeologia (1871) 43 226 ij chestes and the tryangle for the same ornaments to be hengyd. 1849 D. Rock Church our Fathers II. vi. 43 [A doubtful statement]. †i. (More fully triangle virginal), an early kind of keyboard stringed instrument. Obsolete. ΘΚΠ society > leisure > the arts > music > musical instrument > keyboard instrument > stringed keyboards > [noun] > virginals virginal1530 a pair of virginals1542 virginal1566 triangle1663 virginet?c1680 muselar1965 1661 S. Pepys Diary 14 June (1970) II. 121 I sent to my house, by my Lord's order, his shipp and Triangle virginall.] 1663 S. Pepys Diary 18 Mar. (1971) IV. 79 This day, my Tryangle (which was put in tune yesterday) did please me very well. j. A musical instrument of percussion, consisting of a steel rod bent into a triangular form, but open at one corner; it is struck with a small straight steel rod. Also transferred = triangler n. ΘΚΠ society > leisure > the arts > music > musical instrument > percussion instrument > [noun] > triangle triangle1786 1786 T. Busby Compl. Dict. Music Triangle, a steel instrument so called from its consisting of three bars of polished steel, so united at their ends as to produce a triangular frame. 1811 Countess Granville Lett. (1894) I. 21 We play upon the..guitar, triangle, and castagnettes. 1878 F. Hueffer in G. Grove Dict. Music I. 28/1 He is said to have accepted the appointment of supernumerary triangle at the Gymnase. 1913 Times 14 May 8/5 The only percussion (even the usual drums are excluded) consists of triangle and cymbals. k. Name for a kind of large tripod composed of three poles or spars joined at the top, bearing a pulley for hoisting heavy weights, or for weighing: see also quot. 1867. ΘΚΠ society > occupation and work > equipment > lifting or hoisting equipment > [noun] > shear-legs or gin gin1398 lading gin1497 raising gin1497 shearsa1625 Jack1686 triangle1691 crab1739 shear-legs1860 1691 J. Evelyn Kalendarium Hortense (ed. 8) 63 If the Tree be too ponderous to be lifted perpendicular by the Hand alone, by applying a Triangle and Pully..draw out the Tree. 1707 J. Mortimer Whole Art Husbandry (1721) I. 187 Set up three Poles (like unto a Triangle wherewith they usually weigh heavy Ware) spreading at the Bottom. 1867 W. H. Smyth & E. Belcher Sailor's Word-bk. Triangle,..a machine formed by spars for lifting weights, water-casks, &c. Also, a stage hung round a mast, to scrape, paint, or grease it. 1873 5th Rep. Deputy Keeper Public Rec. Ireland 26 in Parl. Papers (C. 760) XXXV. ii. 335 The Records were lowered through the aperture in the centre of the floor by means of a rope, supported by a triangle raised over the opening. l. Military. (Usually plural) A tripod, originally formed of three halberds stuck in the ground and joined at the top, to which soldiers were formerly bound to be flogged; a structure resembling this. ΘΚΠ society > authority > punishment > corporal punishment > instrument or place of corporal punishment > [noun] > whipping-post or tripod pillara1475 rogue stob1550 post1555 whipping-post1600 whipping-stock1615 fork1619 whipstock1619 flogging-stake1785 flogging-block1827 triangle1847 whipping-pole1862 1796 Grose's Classical Dict. Vulgar Tongue (ed. 3) at Halbert Soldiers of the infantry, when flogged, being commonly tied to three halberts, set up in a triangle, with a fourth fastened across them.] 1847 in Webster's Amer. Dict. Eng. Lang. 1853 J. H. Stocqueler Mil. Encycl. 290/1 Triangles, a wooden instrument consisting of three poles so fastened at top that they may spread at bottom in a triangular form... An iron bar, breast high, goes across one side of the triangle. The triangles were used in some regiments for..inflicting military punishments. 1871 G. A. Lawrence Anteros (1872) i. 11 He was unsparing both of his tongue and of the lash—the triangles were an honoured institution in those days. 1897 ‘P. Warung’ Tales Old Regime 29 Already, at Molong [Australia], there is one military-post and a triangles, and at Wellington Valley there is another military-post and another triangles. m. Pottery. A triangular piece of baked ware, with points projecting from the angles, placed between pieces of biscuit ware to prevent their adhering to each other when baking. ΚΠ 1875 E. H. Knight Amer. Mech. Dict. III. 2626/2 Triangle,..4. (Pottery.) A small piece of pottery, placed between pieces of biscuit ware in the seggar, to prevent the adherence of the pieces when fired. n. Angling. A set of three hooks fastened together so that their barbs are at the angular points of a triangle. ΘΚΠ the world > food and drink > hunting > fishing > fishing-tackle > hook > [noun] > hooks fastened together snap-hook1688 snapper1688 springer1688 jigger1815 snap1839 dree-draw1850 stroke-haul1850 triangle1867 gang1879 black doctor1883 murderer1883 trap-hook1883 treble hook1895 treble1897 1867 F. Francis Bk. Angling iv. 97 I had used a single set of small brazed triangles. 1904 W. M. Gallichan Fishing & Trav. Spain 145 The flying triangles are to blame. It is not often that one loses a fish hooked on the tail triangle. o. A drawing-instrument in the form of a right-angled triangle of wood, vulcanite, etc.; a set square. ΘΚΠ society > communication > representation > a plastic or graphic representation > graphic representation > drawing plans or diagrams > [noun] > drawing instruments > triangular set square1854 triangle1875 1875 E. H. Knight Amer. Mech. Dict. III. 2626/2 Triangle,.. 2. (Drafting.) A three-cornered straight-edge, used..for drawing parallel, perpendicular, or diagonal lines. It has one right angle, the two others being each of 45°.., or one of 30° and the other of 60°. p. A triangular warning sign placed on the road to mark the presence of a broken-down vehicle or vehicles. ΘΚΠ society > travel > transport > transport or conveyance in a vehicle > vehicular traffic > [noun] > traffic control > sign warning of broken-down vehicle triangle1969 1969 B. Weil Dossier IX ii. 8 There's your red break~down triangle... They're obligatory in France. 1971 H. Pacy Road Accidents i. 33 Utilize the special warning triangles larger trucks carry for this purpose. 1977 ‘J. Fraser’ Hearts Ease in Death ii. 12 Superintendent Bill Aveyard braked his car when he saw the flashing torches and warning triangles at the side of the road. 3. Collectors' name for certain moths. See also Compounds 2. ΚΠ 1832 J. Rennie Conspectus Butterflies & Moths Brit. 55 The Triangle (Gr[aphiphora] Triangulum, Ochsenheimer) appears the end of July. 1832 J. Rennie Conspectus Butterflies & Moths Brit. 164 The Triangle (P[seudotamia] trigonana, Stephens). Near London. Compounds C1. General attributive. a. (In sense 1c.) triangle drama n. ΘΚΠ society > leisure > the arts > performance arts > drama > a play > [noun] > other types of play king play1469 king game1504 historya1509 chronicle history1600 monology1608 horseplaya1627 piscatory1631 stock play1708 petite pièce1712 mimic1724 ballad opera1730 ballad farce1735 benefit-play1740 potboiler1783 monodrama1793 extravaganza1797 theo-drama1801 monodrame1803 proverb1803 stock piece1804 bespeak1807 ticket-night1812 dramaticle1813 monopolylogue1819 pièce d'occasion1830 interlude1831 mimea1834 costume piece1834 mummers' play1849 history play1850 gag-piece1860 music drama1874 well-made1881 playlet1884 two-decker1884 slum1885 kinderspiel1886 thrill1886 knockabout1887 two-hander1888 front-piece1889 thriller1889 shadow-play1890 mime play1894 problem play1894 one-acter1895 sex play1899 chronicle drama1902 thesis-play1902 star vehicle1904 folk-play1905 radio play1908 tab1915 spy play1919 one-act1920 pièce à thèse1923 dance-drama1924 a mess of plottage1926 turkey1927 weepie1928 musical1930 cliffhanger1931 mime drama1931 triangle drama1931 weeper1934 spine-chiller1940 starrer1941 scorcher1942 teleplay1947 straw-hatter1949 pièce noire1951 pièce rose1951 tab show1951 conversation piece1952 psychodrama1956 whydunit1968 mystery play1975 State of the Nation1980 1931 E. A. Robertson Four Frightened People i. 22 Just another triangle drama. 1961 Times 13 May 5/2 In an all too successful attempt to turn Shakespeare's tragedy into a conventional triangle-drama, Rossini's librettist, Berio, built up Rodrigo. b. (In sense 2j.) triangle-player n. ΘΚΠ society > leisure > the arts > music > musician > instrumentalist > percussion player > [noun] > triangle-player triangler1840 triangle-player1906 1906 J. Joyce Let. 4 Oct. (1966) II. 170 AE ought now to write some..dreamy thing about a..Triangle-player. 1971 D. E. Westlake I gave at Office 24 Arnold dropped an occasional word in, like the triangle player at the Philharmonic. c. triangle-marked adj. ΚΠ 1832 J. Rennie Conspectus Butterflies & Moths Brit. 228 The Triangle-marked Purple (G[racillaria] purpurea, Haworth). Wings..purple, with a three-cornered central halfband... The Triangle-marked Red (G. stigmatella, Stephens)... The Triangle Marked Buff (G. ochracea, Haworth). C2. triangle inequality n. Mathematics the statement that the modulus of the sum of two quantities is less than or equal to the sum of their moduli; (so called from the analogy with the distances between the vertices of a triangle). ΘΚΠ the world > relative properties > number > algebra > [noun] > expression > inequality inequation1855 inequality1875 Minkowski inequality1932 triangle inequality1941 Cauchy–Schwarz inequality1956 ultrametric inequality1967 1941 G. Birkhoff & S. MacLane Surv. Mod. Algebra vii. 183 In any Euclidian vector space, length has the following properties:..\|ξ + η\| ≦ \|ξ\| + \|η\| (the triangle inequality). 1972 M. Kline Math. Thought xlvi. 1083 Schwarz's inequality and the triangle inequality are proved for the norm. triangle moth n. Limacodes asellus. triangle-ways adv. rare = trianglewise adv. ΘΚΠ the world > space > shape > angularity > specific angular shape > [adverb] > triangle triangle1474 trianglewise?1523 three-corneredwise1580 triangularly1604 triangle-ways1689 triangular-wise1707 three-corner-ways1748 three-corner-wise1862 1689 London Gaz. No. 2485/4 16 silver Trencher-Plates..marked with a Cypher triangle-ways. Draft additions 1993 Snooker, etc. The triangular wooden frame used in setting up the balls before the start of play. Cf. frame n. 10. ΘΚΠ society > leisure > entertainment > pastimes > game > billiards, pool, or snooker > [noun] > wooden frame used for setting up balls triangle1890 rack1896 1890 C. C. Moore Games of Pool xii. 79 These balls are placed in the form of a triangle upon the table, as in Pyramids, a wooden frame or ‘triangle’ being employed to save trouble and insure correctness. 1907 Yesterday's Shopping (1969) 1025/2 Billiard accessories... Triangle..each 4/6. 1954 Billiards & Snooker (‘Know the Game’ Ser.) 23 A triangular wooden frame, the ‘triangle’, enables the reds to be set up as shown. 1983 Harrods Mag. Christmas 168 Snooker..tables..complete with two cues, balls, triangle, chalk and scoreboard. This entry has not yet been fully updated (first published 1914; most recently modified version published online March 2022). † triangleadj. Etymology: < Latin triangulus, < tri- comb. form + angulus corner. Obsolete. Having three angles; three-cornered, triangular. Also quasi-adv. In the form of a triangle, triangularly. ΘΚΠ the world > space > shape > angularity > specific angular shape > [adjective] > triangular three-corneredc1400 three-squaredc1400 three-squarec1450 triangle1474 triangled1486 triangular?1541 three-corner1548 trilater1570 trigonal1571 three-corned1584 three-sided1601 triangulated1610 triangulate1611 triform1621 triangulary1622 triquetrous1658 trilateral1660 triagonal1665 trigonic1788 cocked hat1846 heater-shaped1847 the world > space > shape > angularity > specific angular shape > [adverb] > triangle triangle1474 trianglewise?1523 three-corneredwise1580 triangularly1604 triangle-ways1689 triangular-wise1707 three-corner-ways1748 three-corner-wise1862 the world > relative properties > number > geometry > shape or figure > [adjective] > two-dimensional > triangular triangle1474 triangled1486 triangular?1541 trigonal1570 trilater1570 triangulated1610 triangulate1611 triform1621 triangulary1622 triquetrous1658 trilateral1660 trilineal1715 trilinear1715 trigonic1788 trigonate1815 triagonal1831 1661 S. Pepys Diary 14 June (1970) II. 121 I sent to my house, by my Lord's order, his shipp and Triangle virginall.] 1474 W. Caxton tr. Game & Playe of Chesse (1883) iv. i. 159 In one of the corners..was made a toure treangle as a shelde. 1525 Anothomia in tr. H. von Brunschwig Noble Experyence Handy Warke Surg. sig. Bij/1 The bony part [of the nose] hath .ij. tryangle bonis. 1548 Hall's Vnion: Edward IV f. ccj^v Three hilles, not in equal distaunce,..but liyng in maner although not fully triangle. 1660 tr. H. Blum Bk. Five Collumnes Archit. (new ed.) A j Gutta, are drops sometime round, sometime in Triangle fashion. 1803 G. Shaw Gen. Zool. IV. ii. 444 Triangle Sparus [a fish]. Mentioned by Cepede from Commerson: native of the Indian seas. in combination.1663 Marquis of Worcester Cent. Names & Scantlings Inventions §71 A Key perfectly square,..no heavier then the triangle-scrued Key.1663 Marquis of Worcester Cent. Names & Scantlings Inventions §69 A little triangle scrued Key. This entry has not yet been fully updated (first published 1914; most recently modified version published online March 2021). trianglev. Etymology: < triangle n. rare. †1. intransitive. ? To lie or extend in the form of a triangle. Obsolete. ΚΠ 1595 Aberdeen Regr. (1848) II. 129 The said wmquhill M^r Androis yard dyk ascendis south eist..triangling throw an[d] athort the hedis of the yardis of the said vmquhill Badie. 2. transitive. To flog at the triangles (triangle n. 2l). ΘΚΠ society > authority > punishment > corporal punishment > administer corporal punishment [verb (transitive)] > beat threshOE beatc1000 to lay on?c1225 chastise1362 rapa1400 dressc1405 lack?c1475 paya1500 currya1529 coil1530 cuff1530 baste1533 thwack1533 lick1535 firka1566 trounce1568 fight1570 course1585 bumfeage1589 feague1589 lamback1589 lambskin1589 tickle1592 thrash1593 lam1595 bumfeagle1598 comb1600 fer1600 linge1600 taw1600 tew1600 thrum1604 feeze1612 verberate1614 fly-flap1620 tabor1624 lambaste1637 feak1652 flog1676 to tan (a person's) hide1679 slipper1682 liquora1689 curry-comb1708 whack1721 rump1735 screenge1787 whale1790 lather1797 tat1819 tease1819 larrup1823 warm1824 haze1825 to put (a person) through a course of sprouts1839 flake1841 swish1856 hide1875 triangle1879 to give (a person or thing) gyp1887 soak1892 to loosen (a person's) hide1902 1879 L. Wingfield My Lords of Strogue III. iv. 110 His henchman had been well triangled..to extort evidence against his master. This entry has not yet been fully updated (first published 1914; most recently modified version published online March 2019). < n.1398adj.1474v.1595
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trianglen.

Compounds

Draft additions 1993

† triangleadj.

trianglev.