/ Dictionary / Index M mesomere: Meaning and Definition of Find definitions for: mes•o•mere Pronunciation: (mez'u-mēr", mes'-, mē'zu-, -su-), [key] — n. Embryol. a blastomere of intermediate size between a micromere and a macromere. the intermediate zone of the mesoderm. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Mesolonghi mesomerism Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language