n. [ L., a revealer. ] One who, or that which, detects; a detecter. Shak. [ 1913 Webster ]
A deathbed's detector of the heart. Young. [ 1913 Webster ]
Bank-note detector,
Detector lock.
. (Railroads) A bar, connected with a switch, longer than the distance between any two consecutive wheels of a train (45 to 50 feet), laid inside a rail and operated by the wheels so that the switch cannot be thrown until all the train is past the switch. [ Webster 1913 Suppl. ]