The Collaborative International Dictionary of English v.0.48:
myocarditis \my`o*car*di"tis\, n. [NL. see myocardium.] (Med.) Inflammation of the myocardium. [1913 Webster]WordNet (r) 3.0 (2006):
myocarditis n 1: inflammation of the myocardium (the muscular tissue of the heart) [syn: myocardial inflammation, myocarditis]