/ Dictionary / Index C conicoid: Meaning and Definition of Find definitions for: con•i•coid Pronunciation: (kon'i-koid", kō'ni-), [key] — n. Geom. a quadric, esp. a hyperboloid, paraboloid, or ellipsoid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. conical pendulum conic projection Related Content Daily Word Quiz: sumptuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language