concavityn.

/kənˈkavɪti/

Etymology: < French concavité (14th cent.), < Latin concavitās : see concave n. and -ity suffix.

1. The quality or condition of being concave; hollowness.

ΘΚΠ

the world > space > shape > curvature > curved surface > [noun] > concavity

concavity1578

concaveness1730

incavity1730

1578 H. Lyte tr. R. Dodoens Niewe Herball i. xxv. 37 The leafe..is rounde and thicke..With some hollownes or concauitie above.

1605 W. Camden Remaines i. 173 A glasse of Parabolicall concavitie, or burning glasse as some call it.

1794 G. Adams Lect. Nat. & Exper. Philos. II. xv. 211 If the radius of the concavity be less than the radius of convexity.

1841 T. Carlyle On Heroes iii. 169 No twisted, poor convex-concave mirror, reflecting all objects with its own convexities and concavities.

1865 A. Geikie Scenery & Geol. Scotl. vi. 121 The profound concavity of these valleys.

2. A concave surface or side, a hollow vault; each of the hollow ‘spheres’ of ancient astronomy.

ΘΚΠ

the world > the universe > celestial sphere > [noun]

wheelc1175

spherea1300

concavity1483

the world > the universe > celestial sphere > zone of celestial sphere > sphere of ancient astronomy > [noun]

liftOE

heavenOE

wheelc1175

welkina1325

spherec1374

elementc1384

firmamentc1386

roundnessa1398

movablec1400

orbc1449

concavity1483

concameration1625

subcelestial1644

orbit1727

the world > space > shape > curvature > curved surface > [noun] > concavity > a concave surface

hollowc897

concavity1483

concave1554

belly1607

1483 W. Caxton tr. J. de Voragine Golden Legende f. 24/2 Fro the centre of therthe vnto the concauite of the heuen of saturne.

c1550 Complaynt Scotl. (1979) vi. 37 The regione celest..vitht in the concauite of the quhilk, is closit the regione elementar.

1561 R. Eden tr. M. Cortés Arte Nauigation i. v. sig. vii The water and earth..are conteyned vnder the concauitie of the ayre.

1619 M. Drayton Barons Warres vi. xxxi, in Poems (rev. ed.) 84 An Hemisphere; In whose Concauitie, she did compose The Constellations.

1680 J. Moxon Mech. Exercises I. xiii. 229 An Hollow Mandrel, made fit stifly to receive the convexity of the Globe in its concavity.

1868 W. Lockyer & J. N. Lockyer tr. A. Guillemin Heavens (ed. 3) 277 An orbit the concavity of which is always turned towards the Sun.

a. A hollow; a cavity.

ΘΚΠ

the world > space > shape > unevenness > condition or fact of receding > hollowness > [noun] > a cavity or hollow

hollowc897

wombOE

holkc1000

dalkc1325

hollownessc1374

spaciosity?a1425

pitc1480

concavitya1513

doupa1522

capacity?1541

cavity?1541

concave?1541

vacuation?1541

vacuity?1541

sound1603

cave1605

ferme1612

ventriclea1631

core1663

want1664

uterus1692

excavation1781

hog trough1807

a1513 H. Bradshaw Lyfe St. Werburge (1521) i. xxvi. sig. i.v^v Of the sayd oke tree, is a famous opynyon That no man may entre, the sayd concauyte In deedly synne bounden.

1578 J. Banister Hist. Man i. f. 3 These concauities are also encreased by the Gristles in some of them growyng.

1634 R. H. tr. Regim. Salerni 155 In the concavities of the Teeth.

a1652 R. Brome Queenes Exchange v, in Wks. (1873) III. 536 Concavities..for Rich men to hide their treasure in.

1848 J. A. Carlyle tr. Dante Inferno vii We descended into the fourth concavity.

†b. The bore of a gun. Obsolete. Cf. concave n. 1b.

ΘΚΠ

society > armed hostility > military equipment > weapon > device for discharging missiles > firearm > parts and fittings of firearms > [noun] > bore

cylinder?a1560

bore1572

concave1595

concavity1669

1669 S. Sturmy Mariners Mag. v. 79 How a Shot which sticketh fast within the Concavity of a Piece..may be Shot out.

†4. figurative. A recondite matter; a profundity.

ΘΚΠ

the mind > mental capacity > intelligibility > unintelligibility > depth, obscurity > [noun] > instance of

subtletya1387

obscurity1495

difficulty?1504

ambage1520

profundities1582

abstrusity1632

concavity1650

mysterious1836

oracularity1840

Pickwickianism1860

in-reference1967

1650 E. Ashmole tr. A. Dee Fasciculus Chemicus 27 Bringing confusion and discouragement to the young learner, troubling his mind with so many obseruations and seuerall concauities.

1658 tr. J. Ussher Ann. World 191 The more inquisitive and diligent in searching out and describing the concavities of them.

This entry has not yet been fully updated (first published 1891; most recently modified version published online December 2020).

单词	concavity
释义	concavityn. /kənˈkavɪti/ Etymology: < French concavité (14th cent.), < Latin concavitās : see concave n. and -ity suffix. 1. The quality or condition of being concave; hollowness. ΘΚΠ the world > space > shape > curvature > curved surface > [noun] > concavity concavity1578 concaveness1730 incavity1730 1578 H. Lyte tr. R. Dodoens Niewe Herball i. xxv. 37 The leafe..is rounde and thicke..With some hollownes or concauitie above. 1605 W. Camden Remaines i. 173 A glasse of Parabolicall concavitie, or burning glasse as some call it. 1794 G. Adams Lect. Nat. & Exper. Philos. II. xv. 211 If the radius of the concavity be less than the radius of convexity. 1841 T. Carlyle On Heroes iii. 169 No twisted, poor convex-concave mirror, reflecting all objects with its own convexities and concavities. 1865 A. Geikie Scenery & Geol. Scotl. vi. 121 The profound concavity of these valleys. 2. A concave surface or side, a hollow vault; each of the hollow ‘spheres’ of ancient astronomy. ΘΚΠ the world > the universe > celestial sphere > [noun] wheelc1175 spherea1300 concavity1483 the world > the universe > celestial sphere > zone of celestial sphere > sphere of ancient astronomy > [noun] liftOE heavenOE wheelc1175 welkina1325 spherec1374 elementc1384 firmamentc1386 roundnessa1398 movablec1400 orbc1449 concavity1483 concameration1625 subcelestial1644 orbit1727 the world > space > shape > curvature > curved surface > [noun] > concavity > a concave surface hollowc897 concavity1483 concave1554 belly1607 1483 W. Caxton tr. J. de Voragine Golden Legende f. 24/2 Fro the centre of therthe vnto the concauite of the heuen of saturne. c1550 Complaynt Scotl. (1979) vi. 37 The regione celest..vitht in the concauite of the quhilk, is closit the regione elementar. 1561 R. Eden tr. M. Cortés Arte Nauigation i. v. sig. vii The water and earth..are conteyned vnder the concauitie of the ayre. 1619 M. Drayton Barons Warres vi. xxxi, in Poems (rev. ed.) 84 An Hemisphere; In whose Concauitie, she did compose The Constellations. 1680 J. Moxon Mech. Exercises I. xiii. 229 An Hollow Mandrel, made fit stifly to receive the convexity of the Globe in its concavity. 1868 W. Lockyer & J. N. Lockyer tr. A. Guillemin Heavens (ed. 3) 277 An orbit the concavity of which is always turned towards the Sun. 3. a. A hollow; a cavity. ΘΚΠ the world > space > shape > unevenness > condition or fact of receding > hollowness > [noun] > a cavity or hollow hollowc897 wombOE holkc1000 dalkc1325 hollownessc1374 spaciosity?a1425 pitc1480 concavitya1513 doupa1522 capacity?1541 cavity?1541 concave?1541 vacuation?1541 vacuity?1541 sound1603 cave1605 ferme1612 ventriclea1631 core1663 want1664 uterus1692 excavation1781 hog trough1807 a1513 H. Bradshaw Lyfe St. Werburge (1521) i. xxvi. sig. i.v^v Of the sayd oke tree, is a famous opynyon That no man may entre, the sayd concauyte In deedly synne bounden. 1578 J. Banister Hist. Man i. f. 3 These concauities are also encreased by the Gristles in some of them growyng. 1634 R. H. tr. Regim. Salerni 155 In the concavities of the Teeth. a1652 R. Brome Queenes Exchange v, in Wks. (1873) III. 536 Concavities..for Rich men to hide their treasure in. 1848 J. A. Carlyle tr. Dante Inferno vii We descended into the fourth concavity. †b. The bore of a gun. Obsolete. Cf. concave n. 1b. ΘΚΠ society > armed hostility > military equipment > weapon > device for discharging missiles > firearm > parts and fittings of firearms > [noun] > bore cylinder?a1560 bore1572 concave1595 concavity1669 1669 S. Sturmy Mariners Mag. v. 79 How a Shot which sticketh fast within the Concavity of a Piece..may be Shot out. †4. figurative. A recondite matter; a profundity. ΘΚΠ the mind > mental capacity > intelligibility > unintelligibility > depth, obscurity > [noun] > instance of subtletya1387 obscurity1495 difficulty?1504 ambage1520 profundities1582 abstrusity1632 concavity1650 mysterious1836 oracularity1840 Pickwickianism1860 in-reference1967 1650 E. Ashmole tr. A. Dee Fasciculus Chemicus 27 Bringing confusion and discouragement to the young learner, troubling his mind with so many obseruations and seuerall concauities. 1658 tr. J. Ussher Ann. World 191 The more inquisitive and diligent in searching out and describing the concavities of them. This entry has not yet been fully updated (first published 1891; most recently modified version published online December 2020). < n.1483
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