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basion

[bey-see-on, -zee-] /ˈbeɪ siˌɒn, -zi-/
noun, Craniometry
1.
the midpoint of the anterior margin of the foramen magnum.
Origin
1875-1880
1875-80; < Neo-Latin < Greek bás(is) (see basis) + -ion noun suffix
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for basion

basion

/ˈbeɪsɪən/
noun
1.
(anatomy) the midpoint on the forward border of the foramen magnum
Word Origin
C19: from New Latin, from Latin basisbase1
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
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basion in Medicine

basion ba·si·on (bā'sē-ŏn', -zē-)
n.
The middle point on the anterior margin of the great foramen opposite the opisthion.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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