/ Dictionary / Index M microconstituent: Meaning and Definition of Find definitions for: mi•cro•con•stit•u•ent Pronunciation: (mī"krō-kun-stich'-unt), [key] — n. a microscopically small constituent of a metal or alloy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. microcomputing microcopy Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language