Medical Dictionary


noun evo·lu·tion \ˌev-ə-ˈlü-shən also ˌē-və-\

Medical Definition of EVOLUTION

:  a process of change in a certain direction <tumor evolution and progression—I. J. Fidler et al>
a :  the historical development of a biological group (as a race or species) :  phylogeny b :  a theory that the various types of animals and plants have their origin in other preexisting types and that the distinguishable differences are due to modifications in successive generations
evo·lu·tion·ari·ly \-shə-ˌner-ə-lē\ adverb
evo·lu·tion·ary \-shə-ˌner-ē\ adjective
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears