- a. continuation (of the inferior vena cava) a congenital anomaly in which the infrahepatic portion of the vena cava fails to form, and venous drainage of the lower body is maintained through a persistent right supracardinal vein, which becomes a large a. vein.
* * *
azy·gos ā-'zī-gəs n an azygos anatomical part
azy·gos also azy·gous (')ā-'zī-gəs adj not being one of a pair <the \azygos muscle of the uvula> <the \azygos system of veins>
* * *
az·y·gos (azґĭ-gəs) (ə-ziґgəs) [Gr., from a-1 + Gr. zygon yoke] 1. unpaired. 2. any unpaired part, such as the azygos vein.Medical dictionary. 2011.