Singular of precordia.
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pre·cor·di·um -'kȯr-dē-əm n, pl -dia -dē-ə the part of the ventral surface of the body overlying the heart and stomach and comprising the epigastrium and the lower median part of the thorax
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n.
the region of the thorax immediately over the heart.
• precordial adj.
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pre·cor·di·um (pre-korґde-əm) pl. precorґdia [L., from pre- + cor, gen. cordis, heart] the region of the anterior surface of the body covering the heart and stomach; it comprises the epigastric region and the inferior part of the thorax. precordial adjMedical dictionary. 2011.