/ Dictionary / Index G greenschist: Meaning and Definition of Find definitions for: green•schist Pronunciation: (grēn'shist"), [key] — n. Petrol. schist colored green by an abundance of chlorite, epidote, or actinolite. Cf. greenstone. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Greensburg green sea Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language