Main Entry: on·col·o·gy

Pronunciation: \än-ˈkä-lə-jē, äŋ-\

Function: noun

Date: circa 1857

: the study of tumors

— on·co·log·i·cal \ˌäŋ-kə-ˈlä-ji-kəl\ also on·co·log·ic \-jik\ adjective

— on·col·o·gist \än-ˈkä-lə-jist, äŋ-\ noun