Standard Lemma guide

exostosis

noun · 2 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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No pronunciation record was provided for this word.

1

noun

Meaning 1

A benign, bony growth, often covered with cartilage, on the surface of a bone or tooth.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Examples

  • 2013, Quinton Gopen, Fundamental Otology: Pediatric & Adult Practice, Jaypee Brothers Medical Publishers, page 381, Part of the issue is the exostoses themselves, which can lead the surgeon directly into normal important structures. The exostosis may grow medially and become in direct contact with the tympanic membrane. The exostosis may also grow medial to the annular insertion of the tympanic membrane, placing the facial nerve at significant risk.

Meaning relationships

Synonyms: bone spur

Antonyms: none provided

2

noun

Meaning 2

a benign outgrowth from a bone (usually covered with cartilage)

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: growth

History

Etymology

From Koine Greek ἐξόστωσις (exóstōsis, “a diseased excrescence on the bone”), from Ancient Greek ὀστέον (ostéon, “bone”).

Across languages

Translations

17 source translations are retained for this English entry.

  • Catalan: exostosi — benign bony growth
  • Chinese Mandarin: 外生骨疣 — benign bony growth
  • Chinese Mandarin: 外生性骨疣 — benign bony growth
  • Finnish: luukasvama — benign bony growth
  • French: exostose — benign bony growth
  • German: Exostose — benign bony growth
  • German: Überbein — benign bony growth
  • Greek: εξόστωση (exóstosi) — benign bony growth
  • Ido: exostoso — benign bony growth
  • Indonesian: eksostosis — benign bony growth
  • Irish: spor cnáimhe — benign bony growth
  • Italian: esostosi — benign bony growth
  • Italian: spinella — benign bony growth
  • Italian: schinella — benign bony growth
  • Italian: soprosso — benign bony growth
  • Welsh: ecsostosis — benign bony growth
  • Welsh: echasgwrn — benign bony growth