annunciator

  1. Noun.  Anything that announces something.
  2. Noun.  A signalling device that shows which of several electrical circuits is active, especially such a device in a telephone switchboard.
  3. Noun.  A buzzer in a UK signal box, that sounds when a train activates a treadle positioned on the track. Provides a warning or announcement of a nearby train.

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