'Lepidopterist' definitions:

Definition of 'lepidopterist'

noun

An entomologist who specializes in the collection and study of butterflies and moths [syn: lepidopterist, lepidopterologist, butterfly collector]

From: GCIDE

Lepidopterist \Lep`i*dop"ter*ist\, n. (Zool.) One who studies the Lepidoptera. [1913 Webster]