hemizygous vein he·mi·zy·gousvein uncommon noun 1. a continuation of the left ascending lumbar vein; crosses the midline at the 8th vertebra and empties into the azygos vein Synonymshemizygos veinhemizygous veinvena hemizygos Related words Broader terms vein WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
