Dictionary

oncology

noun on·col·o·gy \än-ˈkä-lə-jē, äŋ-\

medical : the study and treatment of cancer and tumors

Full Definition of ONCOLOGY

: 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

See oncology defined for English-language learners

See oncology defined for kids

circa 1857

Medical Dictionary

noun on·col·o·gy \än-ˈkäl-ə-jē, äŋ-\

plural on·col·o·gies

: the study of tumors

—on·co·log·i·cal \ˌäŋ-kə-ˈläj-i-kəl\ also on·co·log·ic \-ik\ adjective

Next Word in the Dictionary: oncomePrevious Word in the Dictionary: oncogenyAll Words Near: oncology

What made you want to look up oncology? Please tell us where you read or heard it (including the quote, if possible).

Put-downs with flair

How to use a word that (literally) drives some people nuts.

Test your vocab with our fun, fast game

Ailurophobia, and 9 other unusual fears