'Evolutionism' definitions:

Definition of 'evolutionism'

(from WordNet)
noun
(biology) a scientific theory of the origin of species of plants and animals [syn: theory of evolution, theory of organic evolution, evolutionism]

Definition of 'Evolutionism'

From: GCIDE
  • Evolutionism \Ev`o*lu"tion*ism\, n. The theory of, or belief in, evolution. See Evolution, 6 and 7. [1913 Webster]