- noun a mechanical device in a disk drive used to position the read/write head over the correct track on a disk
- A mechanical arm that positions a read/write head over the surface of a disk in a computer. Specific locations are accessed by moving the arm across, in conjunction with the rotation of the disk. Also called actuator (2), or actuator arm.
- synonymactuator arm
Cars & Driving
- noun an arm connecting the diaphragm to the contact breaker platform in a vacuum advance mechanism.