Definition of "nasion" [‖Na•si•on]

• The point in the skull where the nasal and frontal bones unite. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The term nasion is applied to the middle of the frontonasal suture."
• "On and above the glabella a trace of the frontal suture sometimes persists; beneath it is the frontonasal suture, the mid-point of which is termed the nasion."
• "Situated between, and connecting the superciliary ridges, is a smooth, somewhat triangular area, the glabella, below which the nasion (frontonasal suture) can be felt as a slight depression at the root of the nose."