¦kärdē(ˌ)ōˌ noun
Etymology: cardi- + myopathy
: a structural or functional disease of heart muscle that is marked especially by hypertrophy of cardiac muscle, by enlargement of the heart, by rigidity and loss of flexibility of the heart walls, or by narrowing of the ventricles but is not due to a congenital developmental defect, to coronary atherosclerosis, to valve dysfunction, or to hypertension