/ Dictionary / Index G glauconite: Meaning and Definition of Find definitions for: glau•co•nite Pronunciation: (glô'ku-nīt"), [key] — n. a greenish micaceous mineral consisting essentially of a hydrous silicate of potassium, aluminum, and iron and occurring in greensand, clays, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: glauconite (Thesaurus) glaucoma glaucophane Related Content Daily Word Quiz: exemplary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language