carabiner

or kar·a·bi·ner

[ kar-uh-bee-ner ]
/ ˌkær əˈbi nər /
|

noun

a D-shaped ring with a spring catch on one side, used for fastening ropes in mountaineering.

Origin of carabiner

1915–20; < Austrian German Karabiner, shortening of German Karabinerhaken carbine hook, equivalent to Karabiner (< French carabine carbine + German -er -er1) + Haken hook1; it was originally used to fasten carbines to bandoleers
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for carabiner

carabiner

/ (ˌkærəˈbiːnə) /

noun

a variant spelling of karabiner

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012