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The Collaborative International Dictionary of English v.0.48 (gcide)

Vibrator \Vi"bra*tor\, n.
One that vibrates, or causes vibration or oscillation of any
kind; specif.
(a) (Elec.) (1) A trembler, as of an electric bell. (2) A
vibrating reed for transmitting or receiving pulsating
currents in a harmonic telegraph system. (3) A device for
vibrating the pen of a siphon recorder to diminish
frictional resistance on the paper. (4) An oscillator.
(b) An ink-distributing roller in a printing machine, having
an additional vibratory motion.
(a) (Music) A vibrating reed, esp. in a reed organ.
(d) (Weaving) Any of various vibrating devices, as one for
slackening the warp as a shed opens.
(e) An attachment, usually pneumatic, in a molding machine to
shake the pattern loose.
(f) 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.
[Webster 1913 Suppl. PJC]