| Word | Definitions | Synonyms |
|---|---|---|
| oncogene | (noun) a gene that disposes normal cells to change into cancerous tumor cells | Synonyms: transforming gene |
| oncologist | (noun) a specialist in oncology | - |
| oncology | (noun) the branch of medicine concerned with the study and treatment of tumors | - |
| oncoming | (noun) the beginning or early stages | Synonyms: onset |