/ Dictionary / Index M megalecithal: Meaning and Definition of Find definitions for: meg•a•lec•i•thal Pronunciation: (meg"u-les'u-thul), [key] — adj. Embryol. having a large amount of yolk, as certain eggs or ova. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. megal- Megalesia 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