Duhaime's Law Dictionary Oncology Definition: That specialty of medicine that has focus the treatment of tumors, cancer. Related Terms: Cancer, Temozolomide, Linear Accelerator "Oncology is the branch of medicine,dealing with tumors," proposes the 2002 (19th edition) of Taber's Cyclopedic of Medicine. There are, as may be expected,, subspecialties of oncology such as, for example, neuro-oncologists,radiation oncologists and chemotherapy oncologists. REFERENCES: Venes, Donald, Editor, Edition 19 Taber's Cyclopedic Medical Dictionary (Philadelpjia, Davis Company Publishers), page 1503 Always looking up definitions? Save time with our search provider (modern browsers only) If you find an error or omission in Duhaime's Law Dictionary, or if you have suggestion for a legal term, we'd love to hear from you!