foramen

[fuh-rey-muhn]
noun, plural foramina [fuh-ram-uh-nuh] .
an opening, orifice, or short passage, as in a bone or in the integument of the ovule of a plant.

Origin:
1665–75; < Latin forāmen hole, opening, equivalent to forā(re) to bore, pierce + -men resultative noun suffix

foraminal [fuh-ram-uh-nl] , adjective
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World English Dictionary
foramen (fɒˈreɪmɛn)
 
n , pl -ramina, -ramens
a natural hole, esp one in a bone through which nerves and blood vessels pass
 
[C17: from Latin, from forāre to bore, pierce]
 
foraminal
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

foramen
pl. foramina, from L. foramen, from forare to pierce (see bore).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

foramen fo·ra·men (fə-rā'mən)
n. pl. fo·ra·mens or fo·ram·i·na (-rām'ə-nə)
An aperture or perforation through a bone or a membranous structure.


fo·ram'i·nal (-rām'ə-nəl) or fo·ram'i·nous (-nəs) adj.
The American Heritage® Stedman's Medical Dictionary
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American Heritage
Science Dictionary
foramen   (fə-rā'mən)  Pronunciation Key 
Plural foramina (fə-rām'ə-nə) or foramens
An opening or short passage, especially in the body. ◇ The large opening in the base of the skull through which the spinal cord passes is called the foramen magnum (māg'nəm). ◇ The opening in the septum between the right and left atria of the heart, present in the fetus but usually closed soon after birth, is the foramen ovale (ō-vāl'ē, -vā'lē, -vä'-).
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
As the nerve enters the optic foramen its dural sheath becomes continuous with
  that lining the orbit and the optic foramen.
In the optic foramen the ophthalmic artery lies below and to its outer side.
The mid-point of the posterior margin of the foramen magnum.
The mid-point of the anterior margin of the foramen magnum.
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