Source : Webster's Revised Unabridged Dictionary (1913)

   Note: The most important European species are the river, or
         brown, trout ({Salmo fario}), the salmon trout, and the
         sewen. The most important American species are the
         brook, speckled, or red-spotted, trout ({Salvelinus
         fontinalis}) of the Northern United States and Canada;
         the red-spotted trout, or Dolly Varden (see {Malma});
         the lake trout (see {Namaycush}); the black-spotted,
         mountain, or silver, trout ({Salmo purpuratus}); the
         golden, or rainbow, trout (see under {Rainbow}); the
         blueback trout (see {Oquassa}); and the salmon trout
         (see under {Salmon}.) The European trout has been
         introduced into America.

   2. (Zo["o]l.) Any one of several species of marine fishes
      more or less resembling a trout in appearance or habits,
      but not belonging to the same family, especially the
      California rock trouts, the common squeteague, and the
      southern, or spotted, squeteague; -- called also
      {salt-water trout}, {sea trout}, {shad trout}, and {gray
      trout}. See {Squeteague}, and {Rock trout} under {Rock}.

   {Trout perch} (Zo["o]l.), a small fresh-water American fish
      ({Percopsis guttatus}), allied to the trout, but
      resembling a perch in its scales and mouth.