< /ˈkɑr diˌi/, car·di·as. Anatomy.
- 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.
n. pl. car•di•as
- The opening of the esophagus into the stomach.
- The upper portion of the stomach that adjoins this opening.