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basion

[bey-see-on, -zee-]
noun Craniometry.
  1. the midpoint of the anterior margin of the foramen magnum.
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Origin of basion

1875–80; < New Latin < Greek bás(is) (see basis) + -ion noun suffix
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for basion

basion

noun
  1. anatomy the midpoint on the forward border of the foramen magnum
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Word Origin

C19: from New Latin, from Latin basis base 1
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
basion in Medicine

basion

(bā′sē-ŏn′, -zē-)
n.
  1. The middle point on the anterior margin of the great foramen opposite the opisthion.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.