Definition of onco- in English:

onco-

Pronunciation: /ˈɒŋkəʊ/

combining form

  • Relating to tumours: oncology

Origin

from Greek onkos 'mass'.

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Word of the day astrogation
Pronunciation: ˌastrə(ʊ)ˈgeɪʃ(ə)n
noun
(in science fiction) navigation in outer space