Standard Lemma guide

onco-

prefix · 1 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

prefix

Meaning 1

Pertaining to tumors.

Definition source: English Wiktionary via Wiktextract

Usage: morpheme

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

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

Across languages

Translations

6 source translations are retained for this English entry.

  • Catalan: onco- — pertaining to tumors
  • German: onko- — pertaining to tumors
  • Hungarian: onko- — pertaining to tumors
  • Italian: onco- — pertaining to tumors
  • Russian: онко- (onko-) — pertaining to tumors
  • Ukrainian: о́нко- (ónko-) — pertaining to tumors