Definition of "grayling"

grayling

noun
plural grayling or graylings
1. Any freshwater fish of the genus Thymallus or specifically Thymallus thymallus, of the salmon family, having a large dorsal fin.
  Quotations
  “This morning,” he said, “We will fish, Turner. We will cast for trout so that we may catch grayling.”
  1922, Michael Arlen, “3/19/2”, in “Piracy”: A Romantic Chronicle of These Days‎
2. Other similar fish
  1. Thymallus arcticus (Arctic grayling)
  2. Salmo salar (Atlantic salmon)
  3. Prototroctes spp. (Retropinnidae)
    Prototroctes maraena (Australian grayling)
    Prototroctes oxyrhynchus (New Zealand grayling)
3. A species of butterfly, Hipparchia semele, of the family Nymphalidae.
4. Other butterflies of genus Hipparchia.
5. Cercyonis pegala (common wood-nymph)