/ Dictionary / Index G guinea worm: Meaning and Definition of Find definitions for: guin'ea worm" Pronunciation: [key] a long, slender, roundworm, Dracunculus medinensis, parasitic under the skin of humans and animals, common in parts of India and Africa. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. guinea pig Guinevere Related Content Daily Word Quiz: pudgy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language