foramen
fo·ra·men
noun
1.
a natural opening or perforation through a bone or a membranous structure
Origin
Borrowed from Latin forāmen (“aperture or opening produced by boring”), from forō (“to pierce or bore”) + -men (nominal suffix).
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.