/ Dictionary / Index R restless cavy: Meaning and Definition of Find definitions for: rest'less ca'vy Pronunciation: [key] a wild guinea pig. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. restless rest mass Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language