• synonyms


[pi-troh-suh l]
  1. petrous; hard or stony.
  2. Anatomy. of or relating to the petrous portion of the temporal bone.
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Origin of petrosal

1735–45; < Latin petrōs(us) rocky (see petro-1, -ose1) + -al1
Related formssub·pe·tro·sal, adjectivesu·per·pe·tro·sal, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for petrosal

Historical Examples of petrosal

  • If, in spite of this, bleeding still continues, it presumably comes from the petrosal sinus.

    A System of Operative Surgery, Volume IV (of 4)


  • This is usually due to extension of the infection along the petrosal sinuses, or perhaps along the transverse sinus.

British Dictionary definitions for petrosal


  1. anatomy of, relating to, or situated near the dense part of the temporal bone that surrounds the inner ear
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Word Origin for petrosal

C18: from Latin petrōsus full of rocks, from petra a rock, from Greek
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

petrosal in Medicine


  1. Relating to or located near the petrous portion of the temporal bone.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.