-ˌmīˈkōsə̇s noun
( plural actinomyco·ses -ōˌsēz)
Etymology: New Latin, from Actinomyces + -osis
: infection with actinomycetes especially of the genus Actinomyces:
a. : a chronic infectious disease of cattle, swine, and man characterized by the formation in mouth and jaw and sometimes also in chest, intestines, skin, mammary tissue, or brain of hard granulomatous masses that may break down and discharge pus containing the causative actinomycetes (usually Actinomyces bovis in domestic animals and presumably A. israeli in man) — see actinomycoma
b. : potato scab