- the large opening in the base of the skull forming the passage from the cranial cavity to the spinal canal.
Origin of foramen magnum
1880–85; < New Latin: literally, great hole
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- the large opening at the base of the skull through which the spinal cord passes
Word Origin for foramen magnum
New Latin: large hole
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
- great foramen
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.