onco-

prefix

Pertaining to tumors.

OriginNew Latin onco- ← Ancient Greek ὄγκος (ónkos) →
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Meanings

prefix
  1. Pertaining to tumors.

Origin

  1. Ancient Greekὄγκος (ónkos)
  2. New Latinonco-
  3. Englishonco-

First attested 1857, from New Latin onco- (“tumor”). from Ancient Greek ὄγκος (ónkos, “lump, mass, bulk”).

More words from New Latin, Ancient Greek

Full word history & related roots →

Translations

Catalan onco-
  • onco-pertaining to tumors
German onko-
  • onko-pertaining to tumors
Hungarian onko-
  • onko-pertaining to tumors
Italian onco-
  • onco-pertaining to tumors
Russian онко-
  • онко- (onko-)pertaining to tumors
Ukrainian о́нко-
  • о́нко- (ónko-)pertaining to tumors
Cite this entry
APA

onco-. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/onco-

MLA

“onco-.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/onco-. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “onco-,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/onco-.

Source: onco- on Wiktionary, CC BY-SA 4.0.