Actinomycosis \Ac`ti*no*my*co"sis\
([a^]k`t[i^]*n[-o]*m[imac]*k[=o]"s[i^]s), n. [NL.] (Med.)
A chronic infectious disease of cattle and man due to
infection with actinomycetes, especially by {Actinomyces
bovis} in cattle and by {Actinomyces israeli} or {Arachnia
propionica} in man. It is characterized by hard swellings
usually in the mouth and jaw. In man the disease may also
affect the abdomen or thorax. In cattle it is called also
{lumpy jaw} or {big jaw}.
[Webster 1913 Suppl. + AS]