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[ong-kol-uh-jee] /ɒŋˈkɒl ə dʒi/
the branch of medical science dealing with tumors, including the origin, development, diagnosis, and treatment of malignant neoplasms.
the study of cancer.
Origin of oncology
First recorded in 1855-60; onco- + -logy
Related forms
[ong-kuh-loj-ik] /ˌɒŋ kəˈlɒdʒ ɪk/ (Show IPA),
oncological, adjective
oncologist, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for oncology


the branch of medicine concerned with the study, classification, and treatment of tumours
Derived Forms
oncological (ˌɒŋkəˈlɒdʒɪkəl) adjective
oncologist, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for oncology

1857, coined in English from onco- "tumor" + -logy "science or study of." Related: Oncologist; oncological.

Online Etymology Dictionary, © 2010 Douglas Harper
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oncology in Medicine

oncology on·col·o·gy (ŏn-kŏl'ə-jē, ŏng-)
The branch of medicine dealing with the physical, chemical, and biological properties of tumors, including study of their development, diagnosis, treatment, and prevention.

on'co·log'i·cal (-kə-lŏj'ĭ-kəl) or on'co·log'ic (-lŏj'ĭk) adj.
on·col'o·gist n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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oncology in Science
The branch of medicine that deals with the diagnosis and treatment of cancer.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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oncology in Culture
oncology [(ong-kol-uh-jee, on-kol-uh-jee)]

The branch of medicine devoted to the study, treatment, and cure of cancer.

The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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