A condition characterised by the formation of one or more neoplasms or tumours. ... Origin: G. Onkosis, swelling, fr. Onkos, bulk, mass ... (05 Mar 2000) ... 
(ong-ko´sis) a morbid condition marked by the development of tumors.
Type: Term Pronunciation: ong-kō′sis Definitions: 1. A condition characterized by the formation of one or more neoplasms or tumors.
oncosis The development of tumors.