/ Dictionary / Index W Weismannism: Meaning and Definition of Find definitions for: Weis•mann•ism Pronunciation: (vīs'män-iz"um), [key] — n. Biol. the theories of heredity as expounded by Weismann, esp. the theory that all inheritable characteristics are carried in the germ plasm, and that acquired characteristics cannot be inherited. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Weismann weiss beer Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language