Ancistrodon piscivorus

moccasin \moc"ca*sin\, n. [An Indian word. Algonquin makisin.]
   [Sometimes written {moccason}.]
   1. A shoe made of deerskin, or other soft leather, the sole
      and upper part being one piece. It is the customary shoe
      worn by the American Indians.
      [1913 Webster]

   2. (Zool.) A poisonous snake of the Southern United States.
      The water moccasin ({Ancistrodon piscivorus} syn.
      {Agkistrodon piscivorus}, also called {cottonmouth} and
      {cottonmouth water moccasin}) is usually found in or near
      water. Above, it is olive brown, barred with black;
      beneath, it is brownish yellow, mottled with darker. The
      upland moccasin is {Ancistrodon atrofuscus}. They resemble
      rattlesnakes, but are without rattles.
      [1913 Webster]

   {Moccasin flower} (Bot.), a species of lady's slipper
      ({Cypripedium acaule}) found in North America. The lower
      petal is two inches long, and forms a rose-colored
      moccasin-shaped pouch. It grows in rich woods under
      coniferous trees.
      [1913 Webster]
    

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]