car•di•aPronunciation: (kär'dē-u), [key]
—pl. -di•aePronunciation: (-dē-ē"), [key] -di•as.
an opening that connects the esophagus and the upper part of the stomach.
a combining form occurring in compounds that denote an anomalous or undesirable action or position of the heart, as specified by the initial element: dextrocardia; tachycardia.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.