/ Dictionary / Index M mecism: Meaning and Definition of Find definitions for: me•cism Pronunciation: (mē'siz-um), [key] — n. Pathol. abnormal prolongation of one or more parts of the body. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Mechnikov Mecklenburg Related Content Daily Word Quiz: candor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language