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foramen magnum

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foramen magnum

  [mag-nuhm]
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–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; < NL: lit., great hole
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Based on the Random House Dictionary, © Random House, Inc. 2009.
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foramen magnum  
n.  The large orifice in the base of the skull through which the spinal cord passes to the cranial cavity and becomes continuous with the medulla oblongata.

[New Latin forāmen magnum : Latin forāmen, opening + Latin magnus, large.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: foramen mag·num
Pronunciation: -'mag-n&m
Function: noun
: the opening in the skull through which the spinal cord passes to become themedulla oblongata
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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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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