/ Dictionary / Index M mesocolon: Meaning and Definition of Find definitions for: mes•o•co•lon Pronunciation: (mez"u-kō'lun, mes"-, mē"zu-, -su-), [key] — pl. -lons, -la the mesentery of the colon. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mesocolon (Thesaurus) mesocephalic mesocranic Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language