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onco-

  1. a combining form meaning “tumor,” “mass,” used in the formation of compound words:

    oncogenic.

onco-

combining_form

  1. denoting a tumour

    oncology

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Word History and Origins

Origin of onco-1

Combining form of Greek ónkos mass, bulk

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Word History and Origins

Origin of onco-1

from Greek onkos

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tortuous

[tawr-choo-uhs ]

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