bodlja

1. (of animals) spine; quill
   Jež se sklupčao i podigao bodlje. — The hedgehog curled up and raised its spines.
2. (of plants or wire) thorn; prickle; barb
   Ubola sam se na bodlju kaktusa. — I pricked myself on a cactus spine.
   Rukav mi se zakačio za bodlje na žici. — My sleeve got caught on the barbs of the wire.

Barbed wire is bodljikava žica.