Standard Lemma guide

endosteum

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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  • Received-Pronunciation: /ɛnˈdɒsti.əm/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • General-American: /ɛnˈdɑsti.əm/

1

noun

Meaning 1

A membranous vascular layer of cells which line the medullary cavity of a bone; an internal periosteum.

Definition source: English Wiktionary via Wiktextract

Topics: biology, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

vascular membrane that lines the inner surface of long bones

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: membrane, tissue layer

History

Etymology

From end- (“inside, internal, within”) (from Ancient Greek ἔνδον (éndon, “within”)) + Ancient Greek ὀστέον (ostéon, “bone”).