Bearing off or away; carrying off; conveying away; specifically, in anatomy and physiology, efferent: opposed to afferent: as, the deferent duct of the testes.n. That which carries or conveys; a conductor.n. Specifically A vessel or duct in the human body for the conveyance of fluids.n. (also called the orbit), in the Ptolemaic system of astronomy, a circle upon the circumference of which another circle was supposed to move, this second circle being called the epicycle, and carrying the body of the planet.n. In mathematics, the locus of the centers of circles of which a bicircular quartic is drawn as the envelop.