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onboard
once
once-over
onchocerciasis
onco-
oncogene
oncogenesis
oncogenic
oncology
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oncoming
oncornavirus
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oncology
on·col·o·gy [ ong kólləjee ]


noun 
Definition:
 
study of cancer: the branch of medicine that deals with the study and treatment of malignant tumors

on·co·log·i·cal [ òngkə lójjik'l ] adjective
on·col·o·gist noun
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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