vi·bra·phone 
(vībrə-fōn′)
(vībrə-fōn′)n.
A percussion instrument similar to a marimba but having metal bars and rotating disks in the resonators to produce a vibrato. Also called vibraharp.
[Latin vibrāre, to shake; see VIBRATE + -PHONE.]
vibra·phon′ist n.
vibraphone