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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
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. 2015.
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Examples from the web for oncology
  • After that, we'll get a referral to a specialist in veterinary oncology and see where to go from there.
  • Mouse cancers are not human cancers, so oncology models can be misleading.
  • Eat lunch at that cafeteria and you will hear conversations that drift from holography to oncology.
  • The test helps explain a long-standing puzzle in oncology.
  • If so, you are applying a radiation oncology technique rather than a chemotherapy technique.
  • We have been told by an oncology surgeon that her case is inoperable.
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 American Heritage® 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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