/ Dictionary / Index M Mendelism: Meaning and Definition of Find definitions for: Men•del•ism Pronunciation: (men'dl-iz"um), [key] — n. the theories of heredity advanced by Gregor Mendel. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mendelism (Thesaurus) Mendelian Mendel's first law Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language