concertina wire

[ kon-ser-tee-nuh-wahyuhr ]

noun
  1. wire with razor-sharp edges or projections, placed in coils as a barrier along the tops of fences or walls, as at a prison, or on the ground to impede advancing enemy troops.

Origin of concertina wire

1
First recorded in 1925–30

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024