naturalist Meaning, Definition & Usage
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noun an advocate of the doctrine that the world can be understood in scientific terms
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noun a biologist knowledgeable about natural history (especially botany and zoology)
natural scientist.
WordNet
Nat"u*ral*ist noun
Etymology
Cf. F.Definitions
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One versed in natural science; a student of natural history, esp. of the natural history of animals. -
One who holds or maintains the doctrine of naturalism in religion. H. Bushnell.