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onager
onanism
onboard
once
once-over
onchocerciasis
onco-
oncogene
oncogenesis
oncogenic
oncology
oncolysis
oncoming
oncornavirus
oncost
ondansetron
Ondes Martenot
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oncogenesis
on·co·gen·e·sis [ òngkō jénnəssiss ]


noun 
Definition:
 
tumor development: the development of a tumor or tumors
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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