/ Dictionary / Index M macular degeneration: Meaning and Definition of Find definitions for: mac'ular degenera'tion Pronunciation: [key] degeneration of the central portion of the retina, resulting in a loss of sharp vision. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. macula lutea maculate Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language