noun, plural en·do·car·di·a [en-doh-kahr-dee-uh] /ˌɛn doʊˈkɑr di ə/. Anatomy.
Examples from the Web for endocardium
The endocardium may be stained from the imbibition of blood.
In the muscular substance of the heart, under the endocardium, there is almost constantly noticed ecchymosis.Poisons: Their Effects and Detection|Alexander Wynter Blyth
When the membrane which lines the cavities of the heart—the endocardium— suffers inflammation, the disease is called endocarditis.Special Report on Diseases of Cattle|U.S. Department of Agriculture
In acute inflammation we find a thickening and a roughened appearance of the endocardium throughout the cavities of the heart.
By extension of inflammation of the endocardium or pericardium the muscle of the heart may become involved.