Standard Lemma guide

claustrum

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: /ˈklɔːstɹəm/

1

noun

Meaning 1

A thin, irregular sheet of grey matter underneath the inner part of the neocortex on both sides of the brains of mammals; its exact function is not understood, but it is believed to facilitate coordination between senses

Definition source: English Wiktionary via Wiktextract

Topics: anatomy, medicine, neuroanatomy, neurology, neuroscience, sciences

Examples

  • For quotations using this term, see Citations:claustrum.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

a layer of grey matter in the brain adjacent to the lenticular nucleus

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: basal ganglion

History

Etymology

Unadapted borrowing from Latin claustrum (“a bolt, bar”). Doublet of cloister.

Across languages

Translations

7 source translations are retained for this English entry.

  • Finnish: aivomuuri — sheet of grey matter
  • German: Vormauer — sheet of grey matter
  • German: Claustrum — sheet of grey matter
  • Italian: claustro — sheet of grey matter
  • Latin: claustrum — sheet of grey matter
  • Polish: przedmurze — sheet of grey matter
  • Russian: огра́да (ográda) — sheet of grey matter