• synonyms


[klaw-struh m, klou-]
noun, plural claus·tra [klaw-struh, klou-] /ˈklɔ strə, ˈklaʊ-/. Anatomy.
  1. barrier.
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Origin of claustrum

1840–50; < New Latin; Latin: bolt, barrier, equivalent to claud(ere) to close, shut + -trum instrumental suffix; cf. cloister
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for claustrum

Historical Examples

  • Claustrum, klaws′trum, n. a thin layer of gray matter in the substance of the hemispheres of the brain:—pl.

    Chambers's Twentieth Century Dictionary (part 1 of 4: A-D)


  • Claustrum: the structure uniting the wings in flight, whether by hooks, by a thickening of the margin, or by a jugum.

  • This opinion was so common that it almost became proverbial: Claustrum sine armario castrum sine armamentario.

claustrum in Medicine


n. pl. claus•tra (-trə)
  1. Any of several anatomical structures resembling a barrier, especially a thin vertical lamina of gray matter of the brain lying close to the outer portion of the lenticular nucleus, from which it is separated by the external capsule.
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Related formsclaustral adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.