Definition of cottonmouth in English:

cottonmouth

Syllabification: cot·ton·mouth
Pronunciation: /ˈkätnˌmouTH
 
/

noun

1A large, dangerous semiaquatic pit viper that inhabits lowland swamps and waterways of the southeastern US. When threatening, it opens its mouth wide to display the white interior. Also called water moccasin.
  • Agkistrodon piscivorus, family Viperidae
More example sentences
  • Dogs bitten by any of Texas' dangerous snakes, including rattlesnakes, cottonmouths, copperheads and coral snakes, often suffer unnecessarily.
  • It's because of birds that I know the difference between a sugar maple and a red maple, a diamondback water snake and a cottonmouth, an American lady and a painted lady.
  • This is the only product that can neutralize toxins from rattlesnakes, cottonmouths, and copperheads.
2 (also cotton mouth) informal Dryness of the mouth: I often have cotton mouth and a headache when I wake up

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