Webster's Revised Unabridged Dictionary · 1913

(Electricity) One that vibrates, or causes vibration or oscillation of any kind;

(Electricity) A trembler, as of an electric bell.

(Electricity) A vibrating reed for transmitting or receiving pulsating currents in a harmonic telegraph system.

(Electricity) A device for vibrating the pen of a siphon recorder to diminish frictional resistance on the paper.

(Electricity) An oscillator.

(Electricity) An ink-distributing roller in a printing machine, having an additional vibratory motion.

(Electricity) A vibrating reed, esp. in a reed organ.

(Electricity) Any of various vibrating devices, as one for slackening the warp as a shed opens.

(Electricity) An attachment, usually pneumatic, in a molding machine to shake the pattern loose.

(Electricity) a small electrical device held in the hand, with a motor that causes the device and hand to vibrate, and is used for vibratory massage.