What does oncology mean?
Oncology is the branch of medicine devoted to cancer. It encompasses the identification and classification of malignant diseases, the study of how cancer develops and spreads, and the use of treatments such as surgery, radiotherapy, chemotherapy, immunotherapy, and targeted drugs. The field also involves supportive care, including the management of pain, nausea, fatigue, and other effects of illness. Medical oncology is the part of the discipline centered especially on cancer treatment, whereas radiation oncology and surgical oncology are separate specialties. In everyday references, oncology may mean either a clinical service, such as a hospital’s oncology department, or the broader body of scientific knowledge about cancer. The term is formal and technical, but widely understood in medical, scientific, and public-health contexts. Its importance extends beyond individual treatment because oncology research also informs cancer prevention, early detection, screening, survivorship, and public-health policy.
nounThe branch of medicine concerned with the diagnosis, treatment, and study of cancer.
- The branch of medicine concerned with the diagnosis, treatment, and study of cancer.
"She specializes in oncology, focusing on cancers that affect the digestive system."
"The oncology team reviewed the results of her latest scan."
"Advances in oncology have significantly improved the treatment of several forms of cancer."
Uncommon; usually used for separate oncology departments, institutions, or fields of practice.
"The two regional oncologies have developed different approaches to pediatric care."
The name comes from Greek roots for “mass” or “swelling” and “study,” preserving the ancient observation that tumors are abnormal growths.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does oncology come from?
Oncology combines the combining form onco-, derived from Greek onkos, meaning “mass” or “swelling,” with -logy, from Greek logos, meaning “study.” The compound form entered English in the early 19th century as the medical study of tumors and related diseases. Ancient Greek had already used onkos for a swelling or mass, a semantic connection preserved in the English word tumor and in derivatives such as oncogenic.
Related word forms
How oncology is actually used
In general use, oncology is normally treated as an uncountable academic or medical discipline. Medical oncology specifically concerns the treatment of cancer, while radiation oncology and surgical oncology are distinct specialties. The plural is uncommon and usually denotes separate departments, institutions, or fields of practice.