• synonyms


adjective Anatomy.
  1. of, relating to, or situated below the arachnoid membrane.
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Origin of subarachnoid

First recorded in 1830–40; sub- + arachnoid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for subarachnoid

Historical Examples of subarachnoid

  • The blood may escape through the pia mater into the subarachnoid cavity, and large clots be formed.

    Special Report on Diseases of the Horse

    United States Department of Agriculture