foramen magnum
the large opening in the base of the skull forming the passage from the cranial cavity to the spinal canal.
Origin of foramen magnum
1Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use foramen magnum in a sentence
The foramen magnum, occipital condyles, and exoccipitals show no unusual features.
In a posterior view the foramen magnum and the four bones which surround it and together form the occipital segment are well seen.
The Vertebrate Skeleton | Sidney H. ReynoldsThe occipital segment consists of four cartilage bones, three of which together surround the foramen magnum.
The Vertebrate Skeleton | Sidney H. ReynoldsJust external to the foramen magnum is a small foramen for the exit of the hypoglossal nerve (figs. 44 and 45, XII).
The Vertebrate Skeleton | Sidney H. ReynoldsThere are often a pair of prominent vacuities in the supra-occipital dorsal to the foramen magnum.
The Vertebrate Skeleton | Sidney H. Reynolds
British Dictionary definitions for foramen magnum
the large opening at the base of the skull through which the spinal cord passes
Origin of foramen magnum
1Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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