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

salmon \salm"on\ sa^m"u^n, n.; pl. salmons -u^nz or
   collectively salmon. oe. saumoun, salmon, f. saumon, fr.
   l. salmo, salmonis, perhaps from salire to leap. cf. sally,
   v.
   1. zool. any one of several species of fishes of the genus
      salmo and allied genera. the common salmon salmo
      salar of northern europe and eastern north america, and
      the california salmon, or quinnat, are the most important
      species. they are extensively preserved for food. see
      quinnat.
      1913 webster
      1913 webster

   note: the salmons ascend rivers and penetrate to their head
         streams to spawn. they are remarkably strong fishes,
         and will even leap over considerable falls which lie in
         the way of their progress. the common salmon has been
         known to grow to the weight of seventy-five pounds;
         more generally it is from fifteen to twenty-five
         pounds. young salmon are called parr, peal, smolt, and
         grilse. among the true salmons are:

   black salmon, or lake salmon, the namaycush.

   dog salmon, a salmon of western north america
      oncorhynchus keta.

   humpbacked salmon, a pacific-coast salmon oncorhynchus
      gorbuscha.

   king salmon, the quinnat.

   landlocked salmon, a variety of the common salmon var.
      sebago, long confined in certain lakes in consequence of
      obstructions that prevented it from returning to the sea.
      this last is called also dwarf salmon.
      1913 webster

   note: among fishes of other families which are locally and
         erroneously called salmon are: the pike perch, called
         jack salmon; the spotted, or southern, squeteague;
         the cabrilla, called kelp salmon; young pollock,
         called sea salmon; and the california yellowtail.
         1913 webster

   2. a reddish yellow or orange color, like the flesh of the
      salmon.
      1913 webster

   salmon berry bot., a large red raspberry growing from
      alaska to california, the fruit of the rubus nutkanus.
      

   salmon killer zool., a stickleback gasterosteus
      cataphractus of western north america and northern asia.
      

   salmon ladder, salmon stair. see fish ladder, under
      fish.

   salmon peel, a young salmon.

   salmon pipe, a certain device for catching salmon. --crabb.

   salmon trout. zool.
      a the european sea trout salmo trutta. it resembles
          the salmon, but is smaller, and has smaller and more
          numerous scales.
      b the american namaycush.
      c a name that is also applied locally to the adult black
          spotted trout salmo purpuratus, and to the steel
          head and other large trout of the pacific coast.
          1913 webster
see also:
salmons salmon sally salmo salmo salar quinnat 
black salmon lake salmon dog salmon oncorhynchus keta humpbacked salmon 
oncorhynchus gorbuscha king salmon landlocked salmon dwarf salmon jack salmon 
kelp salmon sea salmon salmon berry rubus nutkanus salmon killer 
gasterosteus cataphractus salmon ladder salmon stair fish ladder fish 
salmon peel salmon pipe salmon trout salmo trutta salmo purpuratus 

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