\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.