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em·is·sar·y vein

one of the channels of communication between the venous sinuses of the dura mater and the veins of the diploë and the scalp.
See also: condylar emissary vein, mastoid emissary vein, occipital emissary vein, parietal emissary vein.
Synonym(s): vena emissaria [TA], emissarium, emissary (2)
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