/ Dictionary / Index G glauco-: Meaning and Definition of Find definitions for: glauco- Pronunciation: [key] a combining form meaning “gray, opaque,” used in the formation of compound words: glaucophane. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. glaucescent glaucodot Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language