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 (ŏn′kə-vī′rəs, ŏng′-)
Any of a group of viruses that cause cancers in birds and mammals.

[Greek onkos, mass, tumor; see oncology + virus.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Biology) any virus which causes cancer
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈɒŋ kəˌvaɪ rəs)

or on•cor•na•vi•rus

(ɒŋˈkɔr nə-)
n., pl. -rus•es.
any retrovirus of the subfamily Oncovirinae, capable of producing tumors.
[1965–70; onco- (+ RNA) + virus]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
These features include the analysis of human leukocyte antigen loss of heterozygosity, the presence (or absence) of seven of the most common oncogenic viruses, as well as the composition of the T-cell receptor alpha repertoire, which is complementary to the previously-released TCR beta analysis.
In addition, the presence of the oncogenic viruses, human papillomavirus (HPV) and Epstein-Barr virus (EBV), in tumors arising in the oropharynx and nasopharynx increases complexity because of their major prognostic significance.
The increased tumor susceptibility of HIV-positive individuals has been attributed to different factors including immunosuppression, coinfection with oncogenic viruses, and life prolongation secondary to the use of antiretroviral therapy.
The increased vulnerability has been attributed to different factors, namely low immunity, co-infection with oncogenic viruses, and lifespan extension following antiretroviral treatment.
It is worthy to mention that in many parts of the world, including Taiwan, patients with HIV infection have been found to be more liable to have neoplastic lesions compared to healthy individuals.[2] The increased propensity of neoplasms among HIV-positive patients has been thought to be related to different factors, including coinfection with oncogenic viruses, immunosuppression, and life prolongation secondary to the use of antiretroviral therapy.[3] To the best of my knowledge, HIV infection is an evolving health problem in Taiwan.
Oncogenic viruses and their potential role in skin cancer
Park, Ph.D., M.P.H., from Stanford University in Palo Alto, Calif., and colleagues assessed data from a large prospective cohort from the Veterans Affairs to determine whether long-term HIV suppression resulting from sustained antiretroviral therapy reduced the incidence of AIDS-defining cancers and non-AIDS-defining cancers (some of which are caused by oncogenic viruses).
Infections by oncogenic viruses like Human papilloma virus, Epstein-Barr virus and Human Herpes virus are frequent.
While these treatments are effective in managing IBD, they can result in severe acute microbial infections, loss of immunologic control of chronic viral infection (HIV and hepatitis B/C), reactivation of latent infections (HSV, EBV, and CMV), and malignancies resulting from oncogenic viruses (HPV and EBV) [3-5].
Avian oncogenic viruses: the correlation between clinical signs and molecular virus identification, knowledge acquired from the examination of over 1000 flocks.