Servo (noun)

1. A device used to control or regulate the position of a mechanism.
2. A motor and control system for controlling the position of an object.

Origin:

Derived from latin 'servus' meaning 'slave or servant'.

Examples:

1. A servo motor is used to control the movement of the robotic arm.
2. The servo helps to control the speed and direction of the model airplane.
3. The servo on the car's power steering system helps regulate the wheels' position.
4. In robotics, servos are essential components in controlling the movement of robotic limbs.
5. Radio-controlled model cars and boats often use servos to control the steering mechanism.