The Collaborative International Dictionary
cottonmouth \cottonmouth\ n. venomous semiaquatic snake ( Agkistrodon piscivorus) of swamps in southern U.S.; -- called also water moccasin, cottonmouth moccasin, and cottonmouth water moccasin. It grows to a length of about 4 feet. The name refers to the whiteness of the lips and inside of the mouth.
Syn: water moccasin, cottonmouth moccasin, Agkistrodon piscivorus.
WordNet
n. venomous semiaquatic snake of swamps in southern United States [syn: water moccasin, cottonmouth, Agkistrodon piscivorus]
Usage examples of "cottonmouth moccasin".
It was heavy enough to make an impression on a cottonmouth moccasin, though he hoped that wouldn't be necessary.
And on my dusty way back, I'd wade some distance up the snaky old creek watching for any sight of a copperhead or cottonmouth moccasin.
She turned toward him a smooth, immobile face with a nose shaped like the business end of a cottonmouth moccasin and nostrils that ran up instead of out.