salmon trout

a European trout, Salmo trutta.

the lake trout, Salvelinus namaycush.

the steelhead.

any large trout.

Origin of salmon trout

Middle English word dating back to 1350–1400

In the spring-time the salmon-trout and sturgeon used to come up out of the lakes to feed, but they can't get up any more.

The Puddleford Papers, |H. H. Riley
Having chosen a favourable spot, scarcely a moment had passed before I hauled out a salmon-trout a pound or more in weight.

In the Rocky Mountains |W. H. G. Kingston
At Hopedale and Nain, however, salmon-trout are caught only in the summer.

Journal of a Voyage from Okkak, on the Coast of Labrador, to Ungava Bay, Westward of Cape Chudleigh |Benjamin Kohlmeister and George Kmoch
In Green River occurs a salmon-trout attaining a length of at least four feet.

The Romance of the Colorado River |Frederick S. Dellenbaugh

Almost the only fresh supplies obtained here were rock cod and salmon-trout from Disco fiord.

In the Arctic Seas |Francis Leopold McClintock

salmon trout

any of various large trout, esp the sea trout