/ Dictionary / Index C cardiospasm: Meaning and Definition of Find definitions for: car•di•o•spasm Pronunciation: (kär'dē-u-spaz"um), [key] — n. Pathol. failure of the muscle fibers at the lower end of the esophagus to relax, resulting in swallowing difficulty and regurgitation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cardiospasm (Thesaurus) cardiorespiratory cardiotachometer Related Content Daily Word Quiz: penurious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language