Pronunciation: (nē"ō-där'wi-niz"um), [key]
1. the theory of evolution as expounded by later students of Charles Darwin, esp. Weismann, holding that natural selection accounts for evolution and denying the inheritance of acquired characters.
2. any modern theory of evolution holding that species evolve by natural selection acting on genetic variation.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.