Alcolock

/ (ˈælkəʊˌlɒk) /

noun

trademark a breath-alcohol ignition-interlock device, which is fitted to the ignition in certain motor vehicles. The driver must blow into a tube and, if his or her breath contains too much alcohol, a lock is activated to prevent the vehicle starting

Word Origin for Alcolock

C21: from alco ( hol) + lock 1 (sense 2)