a chronic disease of unknown cause, characterized by the development of lesions similar to tubercles in the lungs, bones, skin, eyes, etc.
See sarcoidosis in American Heritage Dictionary 4
(särˌkoi-dōˈsĭs)
nounpl.sar·coid·o·ses(-sēz)
A disease of unknown origin characterized by the formation of granulomatous lesions that appear especially in the liver, lungs, skin, and lymph nodes. Also called sarcoid.