oncology

noun

on·​col·​o·​gy än-ˈkä-lə-jē How to pronounce oncology (audio)
äŋ-
: a branch of medicine concerned with the prevention, diagnosis, treatment, and study of cancer
oncological adjective
or oncologic
oncologist noun

Examples of oncology in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Her work has included athletes, individuals struggling with fertility and oncology patients recovering from cancer treatment. Judy Bart Kancigor, Oc Register, 11 June 2026 The new plant, which will expand AbbVie’s domestic production of neuroscience, immunology and oncology medicines, is expected to be operational in two years. Charles Selle, Chicago Tribune, 10 June 2026 Two Audiences, One Strategic Framework Inside Pfizer’s oncology portfolio, Liu helped lead the strategic development of the company’s first coordinated dual-audience biomarker platform. William Jones, USA Today, 9 June 2026 Nuvalent is a specialist oncology, late-stage development biotech company focused on subsets of lung cancer with specific genetic mutations. Anniek Bao,elsa Ohlen, CNBC, 9 June 2026 See All Example Sentences for oncology

Word History

Etymology

onco- + -logy

First Known Use

circa 1857, in the meaning defined above

Time Traveler
The first known use of oncology was circa 1857

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Cite this Entry

“Oncology.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/oncology. Accessed 16 Jun. 2026.

Kids Definition

oncology

noun
on·​col·​o·​gy än-ˈkäl-ə-jē How to pronounce oncology (audio)
: a branch of medicine concerned with the study and treatment of tumors

Medical Definition

oncology

noun
on·​col·​o·​gy än-ˈkäl-ə-jē, äŋ- How to pronounce oncology (audio)
plural oncologies
: a branch of medicine concerned with the prevention, diagnosis, treatment, and study of cancer
oncological adjective
also oncologic

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