In rock climbing, a stone that is wedged in a crevice and can be used as an anchor point; also called a chock.
From 'chock' (wedged block) + 'stone.' Rock climbers adopted this term to describe naturally occurring or placed wedged stones that serve as protection anchors.
Modern climbing chocks are direct descendants of climbers who noticed natural stones wedged in cracks and realized they could be used for protection—turning geology into safety equipment.
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