The arm, known as a 'surgical localiser' has six joints with a sensor on each joint.

Near the circle's perimeter stood another arm, this one shorter than the rest, known as the Short Arm.

The question that loomed in her mind was: how had the man with the frozen arm known she was in Chicago?

The robot's arms, known in the trade as slave manipulators, are operated from the control room by master manipulators.

The probe is fitted in an arm known as the probe arm.

He developed a splint for fractures of the lower arm, known as a "Bond splint."

The elongated arms are held in place by vegetation; the largest arm known on Earth reaches 12 km.

There, in an 80-foot-long test bay, buses are set atop hydraulic arms known as actuators, one under each wheel.