/ Dictionary / Index H hyperboloid: Meaning and Definition of Find definitions for: hy•per•bo•loid Pronunciation: (hī-pûr'bu-loid"), [key] — n. Math. a quadric surface having a finite center and some of its plane sections hyperbolas. Equation: &hyperboloid;. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hyperboloid (Thesaurus) hyperbolize Hyperborean Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language