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Actuator

//ˈæk.t͡ʃu.eɪ.tɚ// noun

Definitions

Noun
  1. 1
    Something that actuates something else.

    "The mind is the actuator of the body."

  2. 2
    a mechanism that puts something into automatic action wordnet
  3. 3
    A usually electric device that causes a mechanical device (i.e., a mechanism) to be switched on or off. For example; an electric motor that opens and closes a valve.
  4. 4
    The mechanism that moves the head assembly on a disk drive.
  5. 5
    A relay that controls the flow of electricity.

Etymology

From actuate + -or. First attested in 1652.

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