noun.
Any of several theories that explain the evolution of systems or organisms.
noun.
The advocacy of Darwinian evolution by natural selection (Darwinism).
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
(biology) a scientific theory of the origin of species of plants and animals
Word Usage
"Darwin's evolutionism is only part of a radical scientific vision stretching from the first cosmic explosion to the most refined aspects of human taste and feeling."