deferent
A duct in the body serving to carry away from, as opposed to an afferent one.
An imaginary circle surrounding the Earth, in whose periphery either the heavenly body or the centre of the heavenly body's epicycle was supposed to be carried round.
historical
That which carries or conveys.
obsolete
though air be the most favorable deferent of sounds
Where it comes from
From Middle English defferent, from Middle French deferent (modern French déférent) or its etymon Latin dēferēns, dēferentis.
Adapted from the Wiktionary entry deferent (CC BY-SA 4.0).