/ Dictionary / Index M mesoglea: Meaning and Definition of Find definitions for: mes•o•gle•a Pronunciation: (mez"u-glē'u, mes"-, mē"zu-, -su-), [key] — n. the noncellular, gelatinous material between the inner and outer body walls of a coelenterate or sponge. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mesogastrium mesognathous Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language