Found 2 items, similar to myocardium.
English → English (WordNet) Definition: myocardium myocardium n : the middle muscular layer of the heart wall [also: myocardia (pl)]
English → English (gcide) Definition: Myocardium Myocardium \My`o*car"di*um\, n. [NL., fr. Gr. ?, ?, muscle + ? heart.] (Anat.) The main substance of the muscular wall of the heart inclosed between the epicardium and endocardium. [1913 Webster]