/ Dictionary / Index M mesolecithal: Meaning and Definition of Find definitions for: mes•o•lec•i•thal Pronunciation: (mez"u-les'u-thul, mes"-, mē"zu-, -su-), [key] — adj. Embryol. centrolecithal. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mesognathous mesolect Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language