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Medical Term:


Pronunciation: por'e-on, -e-a

Definition: The central point on the upper margin of the external auditory meatus; as a cephalometric landmark, it is located in the middle of the metal rods of the cephalometer.

[G. poros, a passage]

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.