n. A fish of the family Salmonidæ and genus Thymallus.n. The dace.n. A common European butterfly, Hipparchia semele: so called from the gray under side of the wings.n. In Australia, Prototroctes muræna, of the family Hoplochitonidæ, a fish which remotely resembles the English grayling. Also called cucumber-fish, cucumber-mullet, fresh-water herring, and Yarra herring.n. An American agapetid butterfly, Cercyonis alope, which occurs in several well-marked varieties. See below.