/ Dictionary / Index G guaco: Meaning and Definition of Find definitions for: gua•co Pronunciation: (gwä'kō), [key] — pl. -cos. a climbing composite plant, Mikania guaco, of tropical America. its leaves, or a substance obtained from them, sometimes used locally as an antidote for snakebites. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. guacharo Guadalajara Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language