/ Dictionary / Index M microcrystal: Meaning and Definition of Find definitions for: mi•cro•crys•tal Pronunciation: (mī'kru-kris"tl), [key] — n. a microscopic crystal. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. microcosmic salt microcrystalline Related Content Daily Word Quiz: penury Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language