/ Dictionary / Index S senile macular degeneration: Meaning and Definition of Find definitions for: se'nile mac'ular degenera'tion Pronunciation: [key] — Pathol. Pathol. a type of macular degeneration that is one of the leading causes of blindness in the elderly and in which tiny blood vessels grow into the macula of the retina, obscuring vision. Abbr.: SMD Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. senile dementia senility Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language