Meaning of FORAMEN MAGNUM

WordNet Dictionary
	Definition:		[n]  the large opening at the base of the cranium through which the spinal cord passes
	Websites:
	See Also:		braincase, brainpan, cranium, foramen, hiatus
Glossary
	Definition:		a large opening in the occipital bone at the base of the skull through which the spinal cord passes.