Pronunciation: pet′rō-skwā-mō′săl, -skwā′mŭs
1. Relating to the petrous and the squamous portions of the temporal bone.
The definition information for petrosquamosal is provided by Stedman's. You can search our medical dictionary here.
Stedman's, part of Lippincott Williams & Wilkins, provides a comprehensive line of health-science publications for healthcare professionals and medical students.