water moccasin

from WordNet (r) 3.0 (2006)

water moccasin
    n 1: venomous semiaquatic snake of swamps in southern United
         States [syn: {water moccasin}, {cottonmouth}, {cottonmouth
         moccasin}, {Agkistrodon piscivorus}]
    2: any of numerous North American water snakes inhabiting fresh
       waters

from The Collaborative International Dictionary of English v.0.48

Water moccasin \Wa"ter moc"ca*sin\ (Zool.)
   A venomous North American snake ({Ancistrodon piscivorus})
   allied to the rattlesnake but destitute of a rattle. It lives
   in or about pools and ponds, and feeds largely of fishes.
   Called also {water snake}, {water adder}, {water viper}.
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

cottonmouth \cottonmouth\ n.
   venomous semiaquatic snake ({Agkistrodon piscivorus}) of
   swamps in southern U.S.; -- called also {water moccasin},
   {cottonmouth moccasin}, and {cottonmouth water moccasin}. It
   grows to a length of about 4 feet. The name refers to the
   whiteness of the lips and inside of the mouth.

   Syn: water moccasin, cottonmouth moccasin, {Agkistrodon
        piscivorus}.
        [WordNet 1.5 +PJC]

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