Darwinian

adj. of or pertaining to Darwin and his theories (British naturalist and author)

n. follower of Darwinism (theory of evolution by natural selection developed by Charles Darwin)

This article is about Darwinism as a philosophical concept; see evolution for the page on biological evolution; modern evolutionary synthesis for neo-Darwinism; and also evolution (disambiguation). Darwinism is a term for the underlying theory in those ideas of Charles Darwin concerning evolution and natural selection. Discussions of Darwinism usually focus on evolution by natural selection, but sometimes Darwinism is taken to mean evolution more broadly, or other ideas not directly associated with the work of Darwin.
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Noun
1. an advocate of Darwinism
(hypernym) advocate, advocator, proponent, exponent
Adjective
1. of or relating to Charles Darwin's theory of organic evolution; "Darwinian theories"
(pertainym) Darwinism

(n.)
An advocate of Darwinism.
  

(a.)
Pertaining to Darwin; as, the Darwinian theory, a theory of the manner and cause of the supposed development of living things from certain original forms or elements.
  

see survival of the fittest.