Noun
tonearm (plural tonearms)
The pivoting bar that holds the pickup of a record player and conducts the resulting signal to the amplifier.
Arm systems The tone arm (or tonearm) holds the pickup cartridge over the groove, the stylus tracking the groove with the desired force to give the optimal compromise between good tracking and minimizing wear of the stylus and record groove. Source: Internet
Once in place, a short tonearm under this "bridge" plays the record, driven across laterally by a motor. Source: Internet
This provides a similar benefit as the electronic linear tonearm without the complexity and necessity of servo-motor correction for tracking error. Source: Internet