/ Dictionary / Index C cardioactive: Meaning and Definition of Find definitions for: car•di•o•ac•tive Pronunciation: (kär"dē-ō-ak'tiv), [key] — adj. Pharm. of or pertaining to a drug or other substance affecting the function of the heart. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cardioaccelerator cardiodynia Related Content Daily Word Quiz: exemplary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language