/ Dictionary / Index M mammectomy: Meaning and Definition of Find definitions for: mam•mec•to•my Pronunciation: (mu-mek'tu-mē), [key] — pl. -mies. mastectomy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mammary gland mammee Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language