SYN: oncogenous.
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1) relating to tumor formation
2) tending to cause tumors <an \oncogenic virus> <\oncogenic tars>
on·co·gen·i·cal·ly -i-k(ə-)lē adv
on·co·ge·nic·i·ty -jə-'nis-ət-ē n
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adj.
describing a substance, organism, or environment that is known to be a causal factor in the production of a tumour. Some viruses are considered to be oncogenic; these include the papovavirus, the retrovirus, certain adenovirus and herpesvirus, and the Epstein-Barr virus. See also carcinogen.
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on·co·gen·ic (ong″ko-jenґik) giving rise to tumors (either benign or malignant) or causing tumor formation; said especially of tumor-inducing viruses. Cf. tumorigenic.Medical dictionary. 2011.