Actinomycosis

Ac`ti*no*my*co"sis, n. [NL.] (Med.)

Defn: A chronic infectious disease of cattle and man due to the presence of Actinomyces bovis. It causes local suppurating tumors, esp. about the jaw. Called also lumpy jaw or big jaw. -- Ac`ti*no*my*cot"ic (#), a.