actuator
Translation
actuator, operating device
Examples
The robot arm is moved by a hydraulic actuator.
The robot arm is moved by a hydraulic actuator.
A faulty actuator caused the valve to stick.
A faulty actuator caused the valve to stick.
Grammar Patterns
a/an ((adjective)) actuator a device that causes movement The robot arm is moved by a hydraulic actuator.
Similar Words
Synonyms: motor, driver, piston
Etymology
From the verb 'actuate' (to put into action) + '-or', an agent noun suffix. It means 'a thing that actuates'.
Memory Tips
Think of it as the 'actor' in a machine – the part that performs the action or causes movement.