foramen magnum

[mag-nuhm]

foramen magnum

[mag-nuhm]
noun Anatomy.
the large opening in the base of the skull forming the passage from the cranial cavity to the spinal canal.

Origin:
1880–85; < Neo-Latin: literally, great hole
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Foramen magnum is always a great word to know.
So is Achilles tendon. Does it mean:
either one of the second pair of cranial nerves, consisting of sensory fibers that conduct impulses from the retina to the brain
the tendon joining the calf muscles to the heel bone
Collins
World English Dictionary
foramen magnum
 
n
the large opening at the base of the skull through which the spinal cord passes
 
[New Latin: large hole]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Medical Dictionary

foramen magnum foramen mag·num (māg'nəm)
n.
See great foramen.

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