noun, plural cardiae [kahr-dee-ee] , cardias. Anatomy.
an opening that connects the esophagus and the upper part of the stomach.

1775–85; < Neo-Latin < Greek kardía a medical term for this opening, literally, heart; perhaps so called because the opening is on the same side of the body as the heart Unabridged


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.

perhaps orig. representing Greek kardía heart, though coincidence with the abstract noun suffix -ia has influenced sense Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Medical Dictionary

cardia car·di·a (kär'dē-ə)
n. pl. car·di·as or car·di·ae (-dē-ē')

  1. The opening of the esophagus into the stomach.

  2. The upper portion of the stomach that adjoins this opening.

The American Heritage® Stedman's Medical Dictionary
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