Noun water moccasin has 2 senses
  1. water moccasin, cottonmouth, cottonmouth moccasin, Agkistrodon piscivorus - venomous semiaquatic snake of swamps in southern United States
    --1 is a kind of pit viper
    --1 is a member of
     Agkistrodon, genus Agkistrodon, Ancistrodon, genus Ancistrodon
  2. water moccasin - any of numerous North American water snakes inhabiting fresh waters
    --2 is a kind of
    water snake
    --2 is a member of Natrix, genus Natrix
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