/ Dictionary / Index M macrolecithal: Meaning and Definition of Find definitions for: mac•ro•lec•i•thal Pronunciation: (mak"rō-les'u-thul), [key] — adj. Embryol. megalecithal. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. macroinstruction macro lens Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language