…a length of something wound in a joined sequence of concentric rings…
…(of an electrical device such as a voltmeter or microphone) containing a wire coil suspended in a magnetic field, so that the coil either moves in response to a current or produces a current when it is made to move…
…a flat coil of insulated wire connected to a galvanometer, used for finding the strength of a magnetic field from the current induced in the coil when it is quickly turned over or withdrawn…
…a form of induction coil for producing high-frequency alternating currents…
…a coil of wire that drives the cone of a loudspeaker according to the signal current flowing in it…
…a coil used to provide additional inductance in an electric circuit, in order to reduce distortion and attenuation of transmitted signals or to reduce the resonant frequency of an aerial…
…a spiral made from a dried paste of pyrethrum powder, which when lit burns slowly to produce a mosquito-repellent smoke…
…a coil for generating intermittent high voltage from a direct current…
