basion
Also found in: Dictionary, Encyclopedia, Wikipedia.
basion
[ba´se-on]the midpoint of the anterior border of the foramen magnum. 

Basion, visible on the inferior view of the skull. From Dorland's, 2000.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
ba·si·on
(bā'sē-on), [TA]The middle point on the anterior margin of the foramen magnum, opposite the opisthion.
[G. basis, a base]
Farlex Partner Medical Dictionary © Farlex 2012
basion
The midpoint of the anterior margin of the foramen magnum of the skull, which is located on the occipital bone.Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
ba·si·on
(bā'sē-on)The middle point on the anterior margin of the foramen magnum, opposite the opisthion.
[G. basis, a base]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
ba·si·on
(bā'sē-on)Midpoint on anterior margin of foramen magnum, opposite opisthion.
[G. basis, a base]
Medical Dictionary for the Dental Professions © Farlex 2012