actuator

  1. Noun.  Something that actuates something else, especially a mechanism that causes a device to be switched on or off.
  2. Noun.  (computing) The mechanism that moves the head assembly on a disk drive.
  3. Noun.  (context, electrical) A relay that controls the flow of electricity.

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This entry was last updated on RefTopia from its source on 3/20/2012.