noun
or aschoff nodule ˈäˌshȯf-
Usage: usually capitalized A
Etymology: after Ludwig Aschoff died 1942 German pathologist
: one of the tiny lumps consisting of swollen collagen, cells, and fibrils found in the heart muscle and typical of rheumatic heart disease ; also : one of the similar but larger lumps found under the skin especially in rheumatic fever or polyarthritis