/ Dictionary / Index G gibbsite: Meaning and Definition of Find definitions for: gibbs•ite Pronunciation: (gib'zīt), [key] — n. a mineral, hydrated aluminum oxide, AlO&syl;3HO, occurring in whitish or grayish crystals and masses: an important constituent of bauxite ore. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: gibbsite (Thesaurus) Gibbs function gibe Related Content Daily Word Quiz: sylvan Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language