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[ong-kuh-jeen] /ˈɒŋ kəˌdʒin/
noun, Genetics.
any gene that is a causative factor in the initiation of cancerous growth.
Origin of oncogene
First recorded in 1965-70; onco- + gene Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for oncogene


any of several genes, first identified in viruses but present in all cells, that when abnormally activated can cause cancer
Word Origin
C20 from Gk onkos mass, tumour + gene
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 oncogene

1969, from onco- + -gene, from root of Greek gignere (perf. genui) "beget," from PIE *gen- "produce" (see genus). Related: Oncogenesis (1832).

Online Etymology Dictionary, © 2010 Douglas Harper
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oncogene in Medicine

oncogene on·co·gene (ŏng'kə-jēn)
A gene that causes the transformation of normal cells into cancerous tumor cells, especially a viral gene that transforms a host cell into a tumor cell.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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oncogene in Science
A gene that causes normal cells to become cancerous either because the gene is mutated or because the gene is expressed at the wrong time in development. See Note at cancer.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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oncogene in Culture
oncogene [(ong-kuh-jeen)]

Genes in animal DNA that cause cancer.

Note: Every cell contains genes that, when altered slightly, can become oncogenes.
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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