choking coil

from the GNU version of the Collaborative International Dictionary of English.

• (Elec.) A coil of small resistance and large inductance, used in an alternating-current circuit to impede or throttle the current, or to change its phase; -- called also reactance coil or reactor, these terms being now preferred in engineering usage.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a coil of low resistance and high inductance used in electrical circuits to pass direct current and attenuate alternating current