• synonyms


[ten-tawr-ee-uh m, -tohr-]
noun, plural ten·to·ri·a [ten-tawr-ee-uh, -tohr-] /tɛnˈtɔr i ə, -ˈtoʊr-/.
  1. Anatomy. an extension of one of the membranes covering the cerebrum which, with the transverse fissure, separates the cerebrum from the cerebellum.
  2. Zoology. (of an insect) the internal skeleton of the head.
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Origin of tentorium

1655–65; < New Latin tentōrium, Latin: tent, equivalent to ten(dere) to extend, stretch + -tōrium -tory2
Related formsten·to·ri·al, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for tentorium

Historical Examples of tentorium

  • After locating the occipital knob, a horizontal line forward will give us the portion of the tentorium.

    Buchanan's Journal of Man, April 1887


  • Tentorium: a chitinous frame-work within the head, upon which the brain rests.

  • The Cerebrum or Great Brain lies above the plane of the tentorium, and forms much the largest division of the encephalon.

tentorium in Medicine


n. pl. ten•to•ri•a (-tôrē-ə)
  1. A membranous cover or horizontal partition.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.