\Bin"na*cle\, 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.