Definition of Dolly Varden
: a large anadromous or freshwater char (Salvelinus malma) widespread in streams of northwestern North America and eastern Asia —called also Dolly Varden trout
From the M-W Editors
Origin and Etymology of dolly varden
Dolly Varden, gaily dressed coquette in Barnaby Rudge (1841), novel by Charles Dickens
First Known Use: circa 1876
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