= rainbow trout n. at compounds 3.

Any of various fishes having a hard head. U.S. regional. Any of several fishes, esp.: (a) the Atlantic menhaden, Brevoortia tyrannus (also more fully…

North American. Any of various trout found in mountain streams, such as the brook trout, Salvelinus fontinalis, and the rainbow trout, Salmo gairdneri…

With defining prefix, as the name of various species of the genus Salmo (or of the allied genus Salvelinus), and occasionally of other genera.

any of several silvery trout, esp. Salmo gairdneri kamloops; also, = kokanee, n.

a large trout, Oncorhynchus mykiss (formerly Salmo gairdneri), with an iridescent band along the side, native to western North America and widely…

The rainbow trout of North America, Salmo irideus or S. Gairdneri. Also attributive, as steelhead trout.