evolutionism evolutionary • evolutionist · · · Info · Definitions · Synonyms · Characters · · evolutionism · · Text Latin · · Script 12 · · Length Definitions · · · (noun) (biology) a scientific theory of the origin of species of plants and animals. Synonyms: theory of evolution, theory of organic evolution. · · Noun Definition 1 Synonyms · · · theory of evolution · · Synonym 1 theory of organic evolution · · Synonym 2 Characters · · e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075 v latin small letter v U+0076