/ Dictionary / Index M metacryst: Meaning and Definition of Find definitions for: met•a•cryst Pronunciation: (met'u-krist"), [key] — n. Geol. a crystal formed by recrystallization of minerals in a metamorphic rock. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Metacomet meta-dichlorobenzene Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language