cottonmouth
[ kot-n-mouth ]
/ ˈkɒt nˌmaʊθ /
noun, plural cot·ton·mouths [kot-n-mouths, -mouth z] /ˈkɒt nˌmaʊθs, -ˌmaʊðz/.
a venomous snake, Agkistrodon (Ancistrodon) piscivorus, of swamps in southeastern U.S., that grows to about 4 feet (1.2 meters).
Also called
water moccasin.