Alcolock

/ ˈælkəʊˌlɒk /

noun

1. 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 History and Origins

Origin of Alcolock¹

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