n. - One that vibrates, or causes vibration or oscillation of any kind;
n. - A trembler, as of an electric bell.
n. - A vibrating reed for transmitting or receiving pulsating currents in a harmonic telegraph system.
n. - A device for vibrating the pen of a siphon recorder to diminish frictional resistance on the paper.
n. - An oscillator.
n. - An ink-distributing roller in a printing machine, having an additional vibratory motion.
n. - A vibrating reed, esp. in a reed organ.
n. - Any of various vibrating devices, as one for slackening the warp as a shed opens.
n. - An attachment, usually pneumatic, in a molding machine to shake the pattern loose.