ethmoidal vein

Medical Dictionary

ethmoidal vein n.
Any of the veins that drain the ethmoidal sinuses and pass into the superior ophthalmic vein.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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WordNet
ethmoidal vein

noun
veins that drain the ethmoidal sinuses and empty into the superior ophthalmic vein 
WordNet® 3.0, © 2006 by Princeton University.
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