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.
... into a pointed cone; and it is their constant practice to gather the hair into a knot on the top of the head, for the sake, as Dr. Wilson remarks, "of increasing the apparent elevation of the favourite conoid form." The inhabitants of Arakhan admire a broad, smooth forehead, and in order to produce it, they fasten a plate of lead on the heads of the new-born children. On the other hand, "a broad, well-rounded occiput is considered a great beauty" ... — The Descent of Man and Selection in Relation to Sex • Charles Darwin
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