/ Dictionary / Index G gummite: Meaning and Definition of Find definitions for: gum•mite Pronunciation: (gum'īt), [key] — n. Mineral. a yellow to red alteration product of pitchblende and a minor ore of uranium, having a greasy luster and occurring in gumlike masses. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: gummite (Thesaurus) gummed gummous 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