trip wire

English

Noun

trip wire (plural trip wires)

1. Alternative form of tripwire
   • 1961 November, “Talking of Trains: Aircraft on rail tracks”, in Trains Illustrated, page 650:

     Here the protection consists of a 50lb per mile cadmium copper trip-wire mounted on short telegraph posts on both sides of the line, 4ft above rail level. Current through both trip wires energises a relay in the signalbox.

References

• “trip wire”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.