concertina wire
noun
wire with razor-sharp edges or projections, placed in coils as a barrier along the tops of fences or walls, as at a prison.
Origin of concertina wire
First recorded in 1925–30
Words nearby concertina wire
concertgebouw,
concertgoer,
concertina,
concertina movement,
concertina table,
concertina wire,
concertino,
concertize,
concertmaster,
concertmistress,
concerto