conoidadj.n.

Brit.

/ˈkəʊnɔɪd/, U.S.

/ˈkoʊˌnɔɪd/

Etymology: modern < Greek κωνοειδής cone-shaped, κωνοειδές a conoid: see -oid suffix.

A. adj.

Approaching a cone in shape; more or less conical in shape. conoid body: the pineal gland ( New Sydenham Soc. Lexicon). conoid ligament: the posterior fasciculus of the coraco-clavicular ligament, attached above to the conoid tubercle, at the scapular end of the lower surface of the clavicle. conoid teeth: canine teeth.

ΘΚΠ

the world > space > shape > curvature > curved three-dimensional shape or body > [adjective] > conical > conoid

conoid1668

conoidal1741

1668 Philos. Trans. (Royal Soc.) 3 666 Stretching the surface of it from a Plain to a Conoid figure, within the same Circumference.

1774 T. Pennant Tour Scotl. 1772 293 Two large conoid cairns.

1828 J. Stark Elements Nat. Hist. II. 42 Shell turreted or conoid.

1836–9 Todd's Cycl. Anat. & Physiol. II. 155/1 The insertion of the..conoid..ligaments.

B. n.

1. Geometry.

a. A solid generated by the revolution of a conic section about its axis; a conicoid of revolution (esp. a paraboloid or hyperboloid, the ellipsoids or spheroids being often excluded). This is the κωνοειδές of Archimedes.

ΘΚΠ

the world > space > shape > curvature > curved three-dimensional shape or body > [noun] > solid of revolution having conic section

conoida1664

paraboloid1677

the world > relative properties > number > geometry > shape or figure > [noun] > three-dimensional > solid of revolution > formed from curve

conoida1664

paraboloid1677

parabolic conoid1702

spindle1706

hyperboloid1743

1656 T. Hobbes Six Lessons v. 45 in Elements Philos. Your Comparison of the Sphere and Conoeides, so far holds good.]

a1664 I. Barrow Let. in S. P. Rigaud & S. J. Rigaud Corr. Sci. Men 17th Cent. (1841) (modernized text) II. 34 Concerning the parabolical conoids.

1796 C. Hutton Math. & Philos. Dict. (new ed.) I. 327 In the hyperbolic conoid, the section is an ellipse, when its axis makes with the axis of the solid an angle greater than that made by [this] and the asymptote of the generating hyperbola.

1807 C. Hutton Course Math. (ed. 5) II. 274 A diving bell, of the form of a parabolic conoid.

1872 R. A. Proctor Ess. Astron. xii. 164 The [zodiacal] light exhibits usually the figure of an oblique conoid.

†b. See quot. 1736. Obsolete.

ΚΠ

1736 N. Bailey et al. Dictionarium Britannicum (ed. 2) Conoid (with Geomet.), a solid Body resembling a Cone, excepting that instead of a perfect Circle, it has for its Base an Ellipsis or some other Curve approaching thereto.

c. A surface generated by a straight line which continues parallel to a fixed plane, and passes through a fixed straight line and a fixed curve. Cf. conocuneus n.This sense occurs in French conoïde in 1774, and perhaps earlier; it is that now usual in Solid Geometry.

ΘΚΠ

the world > relative properties > number > geometry > surface > [noun] > generated by a line

conocuneus1662

conoid1862

torse1863

the world > space > shape > curvature > curved three-dimensional shape or body > [noun] > conical quality > cone > conoid

conoid1862

1862 G. Salmon Treat. Analytic Geom. Three Dimensions (1874) §448 Surfaces generated by lines parallel to a fixed plane. This is a family of surfaces which includes conoids as a particular case. §450 Surfaces generated by lines which meet a fixed axis. This class also includes the family of conoids.

1865 W. S. Aldis Elem. Solid Geom. §144 If the fixed line be perpendicular to the fixed plane..the surface is called a right conoid.

2. in gen. use. Any body of a shape more or less approaching a cone, esp. one having the form of half a spindle, in which the slant sides from the base to the vertex are curved instead of straight.

ΘΚΠ

the world > space > shape > curvature > curved three-dimensional shape or body > [noun] > conical quality > cone > conoid > conoid object

conoid1793

1793 Sir G. Shuckburgh in Philos. Trans. (Royal Soc.) 83 76 A steel point or cone, resting in a hollow conoid of bell metal.

1835 A. Ure Philos. Manuf. 367 To back off the spiral-coil from the tip of the spindle, and then wind the thread upon it in a shapely conoid.

1868 Proctor in Daily News 25 Nov. The conoid used in ordinary rifle practice..passes much more freely through the air, point first, than an ordinary spherical bullet.

1882 Sladen in Jrnl. Linn. Soc. 16 236 Dorsally the centre of the disk is elevated into a sharp conoid.

3. Anatomy. The pineal gland; = conoid body at sense A.

ΚΠ

1828 in N. Webster Amer. Dict. Eng. Lang.

This entry has not yet been fully updated (first published 1891; most recently modified version published online June 2022).

单词	conoid
释义	conoidadj.n. Brit. /ˈkəʊnɔɪd/, U.S. /ˈkoʊˌnɔɪd/ Etymology: modern < Greek κωνοειδής cone-shaped, κωνοειδές a conoid: see -oid suffix. A. adj. Approaching a cone in shape; more or less conical in shape. conoid body: the pineal gland ( New Sydenham Soc. Lexicon). conoid ligament: the posterior fasciculus of the coraco-clavicular ligament, attached above to the conoid tubercle, at the scapular end of the lower surface of the clavicle. conoid teeth: canine teeth. ΘΚΠ the world > space > shape > curvature > curved three-dimensional shape or body > [adjective] > conical > conoid conoid1668 conoidal1741 1668 Philos. Trans. (Royal Soc.) 3 666 Stretching the surface of it from a Plain to a Conoid figure, within the same Circumference. 1774 T. Pennant Tour Scotl. 1772 293 Two large conoid cairns. 1828 J. Stark Elements Nat. Hist. II. 42 Shell turreted or conoid. 1836–9 Todd's Cycl. Anat. & Physiol. II. 155/1 The insertion of the..conoid..ligaments. B. n. 1. Geometry. a. A solid generated by the revolution of a conic section about its axis; a conicoid of revolution (esp. a paraboloid or hyperboloid, the ellipsoids or spheroids being often excluded). This is the κωνοειδές of Archimedes. ΘΚΠ the world > space > shape > curvature > curved three-dimensional shape or body > [noun] > solid of revolution having conic section conoida1664 paraboloid1677 the world > relative properties > number > geometry > shape or figure > [noun] > three-dimensional > solid of revolution > formed from curve conoida1664 paraboloid1677 parabolic conoid1702 spindle1706 hyperboloid1743 1656 T. Hobbes Six Lessons v. 45 in Elements Philos. Your Comparison of the Sphere and Conoeides, so far holds good.] a1664 I. Barrow Let. in S. P. Rigaud & S. J. Rigaud Corr. Sci. Men 17th Cent. (1841) (modernized text) II. 34 Concerning the parabolical conoids. 1796 C. Hutton Math. & Philos. Dict. (new ed.) I. 327 In the hyperbolic conoid, the section is an ellipse, when its axis makes with the axis of the solid an angle greater than that made by [this] and the asymptote of the generating hyperbola. 1807 C. Hutton Course Math. (ed. 5) II. 274 A diving bell, of the form of a parabolic conoid. 1872 R. A. Proctor Ess. Astron. xii. 164 The [zodiacal] light exhibits usually the figure of an oblique conoid. †b. See quot. 1736. Obsolete. ΚΠ 1736 N. Bailey et al. Dictionarium Britannicum (ed. 2) Conoid (with Geomet.), a solid Body resembling a Cone, excepting that instead of a perfect Circle, it has for its Base an Ellipsis or some other Curve approaching thereto. c. A surface generated by a straight line which continues parallel to a fixed plane, and passes through a fixed straight line and a fixed curve. Cf. conocuneus n.This sense occurs in French conoïde in 1774, and perhaps earlier; it is that now usual in Solid Geometry. ΘΚΠ the world > relative properties > number > geometry > surface > [noun] > generated by a line conocuneus1662 conoid1862 torse1863 the world > space > shape > curvature > curved three-dimensional shape or body > [noun] > conical quality > cone > conoid conoid1862 1862 G. Salmon Treat. Analytic Geom. Three Dimensions (1874) §448 Surfaces generated by lines parallel to a fixed plane. This is a family of surfaces which includes conoids as a particular case. §450 Surfaces generated by lines which meet a fixed axis. This class also includes the family of conoids. 1865 W. S. Aldis Elem. Solid Geom. §144 If the fixed line be perpendicular to the fixed plane..the surface is called a right conoid. 2. in gen. use. Any body of a shape more or less approaching a cone, esp. one having the form of half a spindle, in which the slant sides from the base to the vertex are curved instead of straight. ΘΚΠ the world > space > shape > curvature > curved three-dimensional shape or body > [noun] > conical quality > cone > conoid > conoid object conoid1793 1793 Sir G. Shuckburgh in Philos. Trans. (Royal Soc.) 83 76 A steel point or cone, resting in a hollow conoid of bell metal. 1835 A. Ure Philos. Manuf. 367 To back off the spiral-coil from the tip of the spindle, and then wind the thread upon it in a shapely conoid. 1868 Proctor in Daily News 25 Nov. The conoid used in ordinary rifle practice..passes much more freely through the air, point first, than an ordinary spherical bullet. 1882 Sladen in Jrnl. Linn. Soc. 16 236 Dorsally the centre of the disk is elevated into a sharp conoid. 3. Anatomy. The pineal gland; = conoid body at sense A. ΚΠ 1828 in N. Webster Amer. Dict. Eng. Lang. This entry has not yet been fully updated (first published 1891; most recently modified version published online June 2022). < adj.n.a1664
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