Definition of piton noun from the Oxford Advanced Learner's Dictionary

 

piton

 noun
noun
BrE BrE//ˈpiːtɒn//
 
; NAmE NAmE//ˈpiːtɑːn//
 
 
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a short pointed piece of metal used in rock-climbing. The piton is fixed into the rock and has a rope attached to it through a ring at the other end. Word Origin late 19th cent.: from French, literally ‘eye bolt’.
See the Oxford Advanced American Dictionary entry: piton