Why was "tantrum" trending last week?
epicardia ep·i·car·di·a (ěp'ĭ-kär'dē-ə)
The lower portion of the esophagus extending through the diaphragm to the stomach.
epicardium ep·i·car·di·um (ěp'ĭ-kär'dē-əm)
n. pl. ep·i·car·di·a (-dē-ə)
The inner layer of the pericardium that is in contact with the surface of the heart. Also called visceral layer.