/ Dictionary / Index C cottonmouth: Meaning and Definition of Find definitions for: cot•ton•mouth Pronunciation: (kot'n-mouth"), [key] — pl. -mouths a venomous snake, Agkistrodon (Ancistrodon) piscivorus, of swamps in southeastern U.S., that grows to about 4 ft. (1.2 m). Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cottonmouth (Thesaurus) cotton mill cotton picker Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language