azygous

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azygos

 [az´ĭ-gos]
any unpaired part, as the azygos vein.
azygos vein a vein beginning in the abdomen as a continuation of the ascending lumbar vein; it and its tributaries serve as vessels for the return of blood from the thorax to the superior vena cava. The azygos vein also serves as a connecting link, through the ascending lumbar vein, between the venae cavae returning blood from above and below the heart. See anatomic Table of Veins in the Appendices.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

az·y·gous

(az'ĭ-gŭs, ă-zī'gŭs),
Unpaired; single.
[G. azygos]
Farlex Partner Medical Dictionary © Farlex 2012

az·y·gous

(az'i-gŭs)
Unpaired; single.
[G. azygos]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

azygous

Occurring singly rather than in pairs. From the Greek azugos , unyoked.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005