(Zool.) (a) In England, a large salmon trout of several species, as Salmo trutta and Salmo Cambricus, which ascend rivers; -- called also sea trout. (b) Salvelinus malma of California and Oregon; -- called also Dolly Varden trout and red-spotted trout. (c) The huso or salmon of the Danube. [ 1913 Webster ]