[ in-ee-uh n ]
/ ˈɪn i ən /

noun Craniometry.

a point at the external occipital protuberance of the skull.



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Origin of inion

1805–15; < New Latin < Greek īníon nape of the neck, equivalent to īn- (stem of ī́s) fiber, sinew + -ion diminutive suffix Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for inion

/ (ˈɪnɪən) /


anatomy the most prominent point at the back of the head, used as a point of measurement in craniometry

Word Origin for inion

C19: from Greek: back of the head
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

Medical definitions for inion

[ ĭnē-ən ]


The most prominent projecting point of the occipital bone at the base of the skull.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.