nonlinear coil

nonlinear coil

[′nän‚lin·ē·ər ′kȯil]
(electromagnetism)
Coil having an easily saturable core, possessing high impedance at low or zero current and low impedance when current flows and saturates the core.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.