"muscular substance of the heart," 1866, from myo- "muscle" + Latinized form of Greek kardia "heart" (from PIE root *kerd- "heart"). Related: Myocardial; myocardiac; myocarditis.
myeloma
Mylar
mynah
myo-
MYOB
myocardium
myology
myomancy
myope
myopia
myopic