/ Dictionary / Index M megal-: Meaning and Definition of Find definitions for: megal- Pronunciation: [key] var. ofbefore a vowel: megalopsia. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. megakaryocyte megalecithal 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