noun
1. : a venomous pit viper ( Agkistrodon piscivorus ) of the southern United States that is closely related to the copperhead, is olive or brownish above, paler on the sides, and indistinctly barred with black, has the young much brighter and reddish brown barred with dark brown edged with white, and is semiaquatic and abundant in marshes and abandoned rice ditches where it feeds chiefly on fish and amphibians
2. : water snake a — not used technically
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water moccasin 1
]