ˈgrāliŋ, -lēŋ noun
( plural grayling also graylings )
Etymology: Middle English, from gray + -ling
1. : any of several salmonoid fishes (genus Thymallus ) related to the trouts but having a broad high dorsal fin, inhabiting cold swift streams, and valued as food and sport fishes ; especially : a common European fish ( T. thymallus ) found chiefly in northern Europe and the Alps and locally in England and Scotland — see arctic grayling
2. : either of two salmonoid fishes (genus Prototroctes ) of the southern hemisphere that in many respects resemble those of the genus Thymallus:
a. : a fish ( P. muraena ) of Australia and Tasmania
b. : a New Zealand fish ( P. oxyrhynchus )
3. : any of numerous grayish or brownish butterflies of the family Satyridae