piton piton /ˈpiːtɒn/

noun

1. A metal spike with a hole for a rope; mountaineers drive it into ice or rock to use as a hold  ( piton )
   a metal spike with a hole for a rope; mountaineers drive it into ice or rock to use as a hold
    Mountaineers rely on pitons to ascend steep and icy terrains.
   Mountaineers rely on pitons to ascend steep and icy terrains.