Dictionary.net

• coil forming the part of an electrical circuit such that changing current in it induces a current in a neighboring circuit; "current through the primary coil induces current in the secondary coil"

2006 - WordNet 3.0
By Princeton University

• coil forming the part of an electrical circuit such that changing current in it induces a current in a neighboring circuit; "current through the primary coil induces current in the secondary coil"

2011 - English Dictionary Database
By DataStellar Co., Ltd