a D-shaped ring with a spring catch on one side, used for fastening ropes in mountaineering.
Origin of carabiner
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
mountaineering a metal clip with a spring for attaching to a piton, belay, etcAlso called: snaplink, krab
Word Origin for karabiner
shortened from German Karabinerhaken, literally: carbine hook, that is, one used to attach carbines to a belt
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
coupling device, 1932, shortened from German karabiner-haken "spring hook."
Online Etymology Dictionary, © 2010 Douglas Harper