cuspn.

Brit.

/kʌsp/, U.S.

/kəsp/

Etymology: < Latin cuspis, cuspid-em point.

1. Astrology. The beginning or entrance of a ‘house’.

ΘΚΠ

the world > the universe > celestial sphere > zone of celestial sphere > [noun] > Zodiac > house > beginning of

cusp1579

house cusp1906

1579 T. Lupton Thousand Notable Things viii. 191 Whosoeuer hath any fyxed Starre of the fyrst honor, or magnitude..in the degree of theyr Cuspe of the tenthe house.

1647 W. Lilly Christian Astrol. iv. 33 The Cusp or very entrance of any house, or first beginning.

1651 N. Culpeper Astrol. Judgm. Dis. (1658) 47 In this figure Capricorn is upon the cuspe of the ascendent.

1815 W. Scott Guy Mannering I. iii. 44 Houses of heaven, with their cusps, hours, and minutes; Almuten, Almochoden, Anahibazon, Catahibazon.

1856 R. A. Vaughan Hours with Mystics II. 51 Reckoning the cusps and hours of the houses of heaven!

a. gen. A point, pointed end, apex, peak; an ornament of a pointed form.

ΘΚΠ

the world > space > shape > fact or condition of tapering > condition of tapering to a point > [noun] > a point

pointc1300

neb?a1425

peakc1450

peck1481

cag1604

sharp1633

acuminate1640

cuspis1646

cusp1647

acumination1651

nib1713

spit-point1796

the world > space > relative position > high position > [noun] > highest point or top > pointed

pin?a1475

apex1590

punctilio1601

cone1611

cuspis1646

cusp1647

peak1785

society > leisure > the arts > visual arts > ornamental art and craft > pattern or design > [noun] > pointed form

cusp1876

1647 H. More Philos. Poems ii. App. lxvii The Cuspe of the Cone.

1847 H. Taylor Minor Poems in Wks. (1864) III. 232 And mid the loftiest [mountains] we could well discern One that was shining in a cusp of snow.

1876 D. Rock Textile Fabrics (new ed.) vi. 59 Stopped with graceful cusps and artichokes.

†b. Top, surface.

ΚΠ

1694 R. Franck Northern Mem. 52 That Bush, whose slender Branches wantonly dangle, sporting themselves on the Cusp of the Water.

3. Astronomy. Each of the pointed extremities or ‘horns’ of the crescent moon (or of Mercury and Venus); also of the sun when partially eclipsed.

ΘΚΠ

the world > the universe > sun > [noun] > disc, face > cusp

cusp1676

the world > the universe > planet > primary planet > inferior planet > [noun] > cusp

hornOE

cusp1676

the world > the universe > planet > primary planet > moon > [noun] > cusp

hornOE

cusp1676

1676 E. Halley Let. in S. P. Rigaud & S. J. Rigaud Corr. Sci. Men 17th Cent. (1841) (modernized text) I. 229 70 degrees from the northern cusp [of the moon], then something obtuse.

1765 Philos. Trans. 1764 (Royal Soc.) 54 106 About the middle of the eclipse, the air was very clear, and the cusps well defined.

1793 Herschel in Philos. Trans. (Royal Soc.) 83 202 One cusp of Venus appearing pointed, and the other blunt.

4. Geometry. A point at which two branches of a curve meet and stop, with a common tangent; or at which the moving point describing the curve has its motion exactly reversed. Called also spinode or stationary point. (Also applied to an analogous point on a curved surface.)

ΘΚΠ

the world > relative properties > number > geometry > point > [noun] > of intersection or contact > of specific lines or curves

cuspis1646

focus1656

point of reflection1674

umbilicus1704

cuspid1743

cusp1758

rhamphoid1814

biplanar1849

oscnode1852

tacnode1852

tangential of a point1858

cnicnode1869

uniplane1869

unode1869

1758 I. Lyons Treat. Fluxions vii. §191. 142 A point of Reflection or Cusp.

1857 W. Whewell Hist. Inductive Sci. (ed. 3) II. 362 The peculiar inflected form of the wave surface, which has what is called a cusp.

1875 I. Todhunter Diff. Calculus (ed. 7) xxii. §301 If the two branches lie on opposite sides of the common tangent, the cusp is said to be of the first species; if on the same side, the cusp is said to be of the second species..Cusps of the first species have been called ‘keratoid’ cusps, and of the second ‘rhamphoid cusps’.

5. Architecture. Each of the projecting points between the small arcs or ‘foils’ in Gothic tracery, arches, etc.

ΘΚΠ

society > leisure > the arts > visual arts > architecture > architectural ornament > [noun] > ornamentation by foils > cusp

cusp1813

1813 Sir J. Hall Ess. Gothic Archit. 32 In all the concave bends of the stone-work, a small pointed ornament occurs, which is very common in Gothic windows..I have ventured to apply to it [the name] of cusp, by which mathematicians denote a figure of this sort.

1845 Ecclesiologist 4 20 Ball-flowers, mouldings, feathered cusps, and other decorative detail.

6. Anatomy.

a. A projection or protuberance upon the crown of a tooth: cf. cuspidate adj.

ΘΚΠ

the world > life > the body > digestive or excretive organs > digestive organs > mouth > substance or parts of teeth > [noun] > crown and parts

mensa1684

crown1733

cusp1849

face1872

hypocone1888

hypoconid1888

tritocone1896

hypoconulid1897

talon1898

1849–52 Todd's Cycl. Anat. & Physiol. IV. ii. 921/1 The four principal cusps..are more pointed and prolonged than in Man.

1872 St. G. Mivart Lessons Elem. Anat. (1873) vii. 252 The sixth and seventh teeth of the lower jaw are called true molars. Each bears five cusps.

b. Any pointed projection or extremity, as of the valves of the heart.

ΘΚΠ

the world > life > biology > physical aspects or shapes > projection or protuberance > [noun] > pointed projection

tongue1398

jag1578

mucro1646

spur1681

rostruma1728

spicula1753

spikelet1851

lingula1856

mucronation1862

cusp1879

mucronule1890

1879 T. Bryant Man. Pract. Surg. (ed. 3) I. viii. 301 The valve cusps being unable to meet and close the canal.

7. Botany. A pointed end of any organ; esp. a sharp rigid point of a leaf.

ΘΚΠ

the world > plants > part of plant > part defined by form or function > [noun] > pointed end

mucro1744

cuspis1785

cusp1870

1870 J. D. Hooker Student's Flora Brit. Islands 319 Leaves opposite hastate~deltoid with horizontal cusps.

1870 J. D. Hooker Student's Flora Brit. Islands 328 Euphorbia amygdaloides..cusps of glands converging.

This entry has not yet been fully updated (first published 1893; most recently modified version published online June 2022).

单词	cusp
释义	cuspn. Brit. /kʌsp/, U.S. /kəsp/ Etymology: < Latin cuspis, cuspid-em point. 1. Astrology. The beginning or entrance of a ‘house’. ΘΚΠ the world > the universe > celestial sphere > zone of celestial sphere > [noun] > Zodiac > house > beginning of cusp1579 house cusp1906 1579 T. Lupton Thousand Notable Things viii. 191 Whosoeuer hath any fyxed Starre of the fyrst honor, or magnitude..in the degree of theyr Cuspe of the tenthe house. 1647 W. Lilly Christian Astrol. iv. 33 The Cusp or very entrance of any house, or first beginning. 1651 N. Culpeper Astrol. Judgm. Dis. (1658) 47 In this figure Capricorn is upon the cuspe of the ascendent. 1815 W. Scott Guy Mannering I. iii. 44 Houses of heaven, with their cusps, hours, and minutes; Almuten, Almochoden, Anahibazon, Catahibazon. 1856 R. A. Vaughan Hours with Mystics II. 51 Reckoning the cusps and hours of the houses of heaven! 2. a. gen. A point, pointed end, apex, peak; an ornament of a pointed form. ΘΚΠ the world > space > shape > fact or condition of tapering > condition of tapering to a point > [noun] > a point pointc1300 neb?a1425 peakc1450 peck1481 cag1604 sharp1633 acuminate1640 cuspis1646 cusp1647 acumination1651 nib1713 spit-point1796 the world > space > relative position > high position > [noun] > highest point or top > pointed pin?a1475 apex1590 punctilio1601 cone1611 cuspis1646 cusp1647 peak1785 society > leisure > the arts > visual arts > ornamental art and craft > pattern or design > [noun] > pointed form cusp1876 1647 H. More Philos. Poems ii. App. lxvii The Cuspe of the Cone. 1847 H. Taylor Minor Poems in Wks. (1864) III. 232 And mid the loftiest [mountains] we could well discern One that was shining in a cusp of snow. 1876 D. Rock Textile Fabrics (new ed.) vi. 59 Stopped with graceful cusps and artichokes. †b. Top, surface. ΚΠ 1694 R. Franck Northern Mem. 52 That Bush, whose slender Branches wantonly dangle, sporting themselves on the Cusp of the Water. 3. Astronomy. Each of the pointed extremities or ‘horns’ of the crescent moon (or of Mercury and Venus); also of the sun when partially eclipsed. ΘΚΠ the world > the universe > sun > [noun] > disc, face > cusp cusp1676 the world > the universe > planet > primary planet > inferior planet > [noun] > cusp hornOE cusp1676 the world > the universe > planet > primary planet > moon > [noun] > cusp hornOE cusp1676 1676 E. Halley Let. in S. P. Rigaud & S. J. Rigaud Corr. Sci. Men 17th Cent. (1841) (modernized text) I. 229 70 degrees from the northern cusp [of the moon], then something obtuse. 1765 Philos. Trans. 1764 (Royal Soc.) 54 106 About the middle of the eclipse, the air was very clear, and the cusps well defined. 1793 Herschel in Philos. Trans. (Royal Soc.) 83 202 One cusp of Venus appearing pointed, and the other blunt. 4. Geometry. A point at which two branches of a curve meet and stop, with a common tangent; or at which the moving point describing the curve has its motion exactly reversed. Called also spinode or stationary point. (Also applied to an analogous point on a curved surface.) ΘΚΠ the world > relative properties > number > geometry > point > [noun] > of intersection or contact > of specific lines or curves cuspis1646 focus1656 point of reflection1674 umbilicus1704 cuspid1743 cusp1758 rhamphoid1814 biplanar1849 oscnode1852 tacnode1852 tangential of a point1858 cnicnode1869 uniplane1869 unode1869 1758 I. Lyons Treat. Fluxions vii. §191. 142 A point of Reflection or Cusp. 1857 W. Whewell Hist. Inductive Sci. (ed. 3) II. 362 The peculiar inflected form of the wave surface, which has what is called a cusp. 1875 I. Todhunter Diff. Calculus (ed. 7) xxii. §301 If the two branches lie on opposite sides of the common tangent, the cusp is said to be of the first species; if on the same side, the cusp is said to be of the second species..Cusps of the first species have been called ‘keratoid’ cusps, and of the second ‘rhamphoid cusps’. 5. Architecture. Each of the projecting points between the small arcs or ‘foils’ in Gothic tracery, arches, etc. ΘΚΠ society > leisure > the arts > visual arts > architecture > architectural ornament > [noun] > ornamentation by foils > cusp cusp1813 1813 Sir J. Hall Ess. Gothic Archit. 32 In all the concave bends of the stone-work, a small pointed ornament occurs, which is very common in Gothic windows..I have ventured to apply to it [the name] of cusp, by which mathematicians denote a figure of this sort. 1845 Ecclesiologist 4 20 Ball-flowers, mouldings, feathered cusps, and other decorative detail. 6. Anatomy. a. A projection or protuberance upon the crown of a tooth: cf. cuspidate adj. ΘΚΠ the world > life > the body > digestive or excretive organs > digestive organs > mouth > substance or parts of teeth > [noun] > crown and parts mensa1684 crown1733 cusp1849 face1872 hypocone1888 hypoconid1888 tritocone1896 hypoconulid1897 talon1898 1849–52 Todd's Cycl. Anat. & Physiol. IV. ii. 921/1 The four principal cusps..are more pointed and prolonged than in Man. 1872 St. G. Mivart Lessons Elem. Anat. (1873) vii. 252 The sixth and seventh teeth of the lower jaw are called true molars. Each bears five cusps. b. Any pointed projection or extremity, as of the valves of the heart. ΘΚΠ the world > life > biology > physical aspects or shapes > projection or protuberance > [noun] > pointed projection tongue1398 jag1578 mucro1646 spur1681 rostruma1728 spicula1753 spikelet1851 lingula1856 mucronation1862 cusp1879 mucronule1890 1879 T. Bryant Man. Pract. Surg. (ed. 3) I. viii. 301 The valve cusps being unable to meet and close the canal. 7. Botany. A pointed end of any organ; esp. a sharp rigid point of a leaf. ΘΚΠ the world > plants > part of plant > part defined by form or function > [noun] > pointed end mucro1744 cuspis1785 cusp1870 1870 J. D. Hooker Student's Flora Brit. Islands 319 Leaves opposite hastate~deltoid with horizontal cusps. 1870 J. D. Hooker Student's Flora Brit. Islands 328 Euphorbia amygdaloides..cusps of glands converging. This entry has not yet been fully updated (first published 1893; most recently modified version published online June 2022). < n.1579
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