/ Dictionary / Index A alfalfa butterfly: Meaning and Definition of Find definitions for: alfal'fa but"terfly Pronunciation: [key] a sulfur butterfly, Colias eurytheme, having orange wings edged with black, the larvae of which feed on alfalfa and other legumes. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. alfalfa alfalfa weevil Related Content Daily Word Quiz: effervescent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language