carabiner
/ˌkɛrəˈbinər/
noun
- A metal ring with a spring-loaded gate, used to quickly connect ropes, straps, or other equipment, especially in climbing.
- Before starting the climb, she checked that each carabiner was properly locked.
- He attached the water bottle to his backpack with a small carabiner.
- The rescue team used a heavy-duty carabiner to secure the harness.