[pawr-ee-on, pohr-]

noun, plural po·ri·a [pawr-ee-uh, pohr-] /ˈpɔr i ə, ˈpoʊr-/, po·ri·ons. Craniometry.

the most lateral point in the roof of the bony external auditory meatus.

Origin of porion

1905–10; < New Latin < Greek pór(os) passage, way (see pore2) + -ion diminutive suffix
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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n. pl. po•ri•a (pôrē-ə)

The central point on the upper margin of the external auditory meatus.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.