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n. pl. fo·ram·i·na (-răm′ə-nə) or fo·ra·mens
An opening or orifice, as in a bone or in the covering of the ovule of a plant.

[Latin forāmen, an opening, from forāre, to bore.]

fo·ram′i·nal (-răm′ə-nəl), fo·ram′i·nous (-nəs) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


n, pl -ramina (-ˈræmɪnə) or -ramens
(Anatomy) 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 and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(fəˈreɪ mən)

n., pl. -ra•mens, -ram•i•na (-ˈræm ə nə)
a small opening, orifice, or perforation, as in a bone or in the ovule of a plant.
[1665–75; < Latin forāmen hole, opening =forā(re) to bore1, pierce + -men resultative n. suffix]
fo•ram•i•nal (fəˈræm ə nl) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.


A hole in a bone or between two body cavities.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.foramen - a natural opening or perforation through a bone or a membranous structureforamen - a natural opening or perforation through a bone or a membranous structure
foramen of Monro, interventricular foramen, Monro's foramen - the small opening (on both the right and left sides) that connects the third ventricle in the diencephalon with the lateral ventricle in the cerebral hemisphere
foramen magnum - the large opening at the base of the cranium through which the spinal cord passes
opening, gap - an open or empty space in or between things; "there was a small opening between the trees"; "the explosion made a gap in the wall"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
[17,18] Sindou et al [3] have reported creation of false paths in 10 out of 200 such procedures; one in jugular foramen, two in carotid canal and seven in foramen Vesalius.
The mean, standard deviation and range of the distances (mm) between the pharyngeal tubercle and foramen ovale (PT-FO), foramen lacerum (PT-FL), occipital condyle (PT-OC), carotid canal (PT-CC), jugular foramen (PT-JF) and hypoglossal canal (PT-HC); and between the foramen magnum and occipital condyle (FM-OC) and hypoglossal canal (FM-HC).
Poor cervical posture, especially upper cervical extension ("hinge neck") may lead to greater obstruction of the IJVs, as they wrap around the TPs of the C (16,17) when the jugular foramen moves posteriorly in relation to the C1.
These spinal fibers enter the posterior cranial fossa via the foramen magnum, merge with the cranial fibers, and then exit through the jugular foramen along with the fibers of the glossopharyngeal and vagus nerves.
A rare instance of jugular foramen meningocele being identified in an NF1 patient on imaging is described in this paper.
All 37 cases with tumors in anterior skull base and all 14 cases with tumors in jugular foramen received total tumor removal.
Magnetic resonance imaging (MRI) showed a destructive and locally invasive tumor in the peripheral vestibular system on the left side expanding into the cerebellopontine angle, inferiorly toward the jugular foramen. The tumor measured 30 mm in the transverse diameter and had characteristic, cystic, and nodular components, dislocating the vestibulocochlear nerve (Figure 1).
(2, 3, 9, 13) Its sheath extends superiorly to the jugular foramen and inferiorly to the aortic arch and is bordered anteriorly by the styloid process and PPS, laterally by the anterior belly of the digastric muscle and the PS and medially by the lateral margin of the RPS.
(1) It is formed by the union of the sigmoid and inferior petrosal dural venous sinuses within the jugular foramen. (2) At its origin, there is a dilatation called the superior bulb of the jugular vein.
The third finding on the same skull was the presence of an unusual large jugular foramen divided by a bridge of bone lateral to the right occipital condyle in front of condylar fossa.
Findings reflect right jugular foramen schwannoma, manifested by denervation of the right sternocleidomastoid and trapezius muscle as well as right portion of the tongue accounting for neuropathies of the glossopharyngeal, vagus, accessory and hypoglossal cranial nerves.
It is apparent just posteroinferior to the jugular foramen and posterior to the hypoglossal canal.