[1] : The Collaborative International Dictionary of English v.0.48

trout \trout\ trout, n. as. truht, l. tructa, tructus; akin
   to gr. trw`kths a sea fish with sharp teeth, fr. trw`gein to
   gnaw.
   1. zool. any one of numerous species of fishes belonging to
      salmo, salvelinus, and allied genera of the family
      salmonidae. they are highly esteemed as game fishes and
      for the quality of their flesh. all the species breed in
      fresh water, but after spawning many of them descend to
      the sea if they have an opportunity.
      1913 webster
      1913 webster

   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.
         1913 webster

   2. zool. 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.
      1913 webster

   trout perch zool., a small fresh-water american fish
      percopsis guttatus, allied to the trout, but
      resembling a perch in its scales and mouth.
      1913 webster
see also:
salmo salvelinus salmonidae salmo fario salvelinus fontinalis malma 
namaycush salmo purpuratus rainbow oquassa salmon 
salt-water trout sea trout shad trout gray trout squeteague 
rock trout rock trout perch percopsis guttatus 

Perch >> P Words
Perch, definition of term: Perch
perch_pag1.html

Trout >> T Words
Trout, definition of term: Trout
trout_pag1.html

Sea Trout >> S Words
Sea Trout, definition of term: Sea Trout
sea+trout_pag1.html

Rainbow Trout >> R Words
Rainbow Trout, definition of term: Rainbow Trout
rainbow+trout_pag1.html

Pike Perch >> P Words
Pike Perch, definition of term: Pike Perch
pike+perch_pag1.html

Golden Trout >> G Words
Golden Trout, definition of term: Golden Trout
golden+trout_pag1.html

Brown Trout >> B Words
Brown Trout, definition of term: Brown Trout
brown+trout_pag1.html