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1. A semiaquatic pit viper (Agkistrodon piscivorus) of lowlands and swampy regions of the southeast United States. Also called cottonmouth.
2. Any of various similar but harmless water snakes.
(Animals) a large dark grey venomous snake, Agkistrodon piscivorus, of swamps in the southern US: family Crotalidae (pit vipers). Also called: cottonmouth
1. the cottonmouth.
2. any of various similar but harmless snakes, as a water snake of the genus Nerodia.
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|Noun||1.||water moccasin - venomous semiaquatic snake of swamps in southern United States|
pit viper - New World vipers with hollow fangs and a heat-sensitive pit on each side of the head
|2.||water moccasin - any of numerous North American water snakes inhabiting fresh waters|
water snake - any of various mostly harmless snakes that live in or near water