/ Dictionary / Index M mesovarium: Meaning and Definition of Find definitions for: mes•o•var•i•um Pronunciation: (mez"u-vâr'ē-um, mes"-, mē"zu-, -su-), [key] — pl. -var•i•a the mesentery of the ovary. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mesotron Mesozoa Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language