CONOID, noun [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.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI