az·y·gous I. adjective oraz·y·gos\ˈazəgəs\ Etymology: New Latin azygos, from Greek, from a- a- (II) + -zygos (from zygon yoke) — more at yoke : not one of a pair : odd, single < the azygous muscle of the uvula > II. noun orazygos\“\ (-es) : an azygous part