GNU Collaborative International Dictionary of English

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1.       
   Binnacle , n. [For bittacle, corrupted (perh. by influence of bin) fr. Pg. bitacola binnacle, fr. L. habitaculum dwelling place, fr. habitare to dwell. See Habit, and cf. Bittacle.] (Naut.) A case or box placed near the helmsman, containing the compass of a ship, and a light to show it at night.
   Totten.
   
   1913 Webster