Adjacent Words

Conoid definitions

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Webster's 1828 Dictionary

CONOID, n. [Gr., a cone, form.]
1. In geometry, a solid formed by the revolution of a conic section about its axis. If the conic section is a parabola, the resulting solid is a parabolic conoid, or paraboloid; if a hyperbola, the solid is a hyperbolic conoid, or hyperboloid; of an ellipse, an elliptic conoid, a spheroid, or an ellipsoid.
2. In anatomy, a gland in the third ventricle of the brain, resembling a cone or pine-apple, and called the pineal gland.

WordNet (r) 3.0 (2005)

n
1: a shape whose base is a circle and whose sides taper up to a point [syn: cone, conoid, cone shape]

Merriam Webster's

or conoidal adjective Date: 1570 shaped like or nearly like a cone <conoid shells> <conoid pottery> • conoid noun

Oxford Reference Dictionary

adj. & n. --adj. (also conoidal) cone-shaped. --n. a cone-shaped object.

Webster's 1913 Dictionary

Conoid Co"noid, n. [Gr. ? conical; ? cone + ? from: cf. F. cono["i]de.] 1. Anything that has a form resembling that of a cone. 2. (Geom.) (a) A solid formed by the revolution of a conic section about its axis; as, a parabolic conoid, elliptic conoid, etc.; -- more commonly called paraboloid, ellipsoid, etc. (b) A surface which may be generated by a straight line moving in such a manner as always to meet a given straight line and a given curve, and continue parallel to a given plane. --Math. Dict.

Webster's 1913 Dictionary

Conoid Co"noid a. Resembling a cone; conoidal.