/ Dictionary / Index C cotton gum: Meaning and Definition of Find definitions for: cot'ton gum". Pronunciation: [key] any of several tupelo trees, esp. Nyssa aquatica. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cotton grass cotton mill Related Content Daily Word Quiz: illegible Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language