For Arete we have terms and definitions in 3 topics. The topics are Geography, Hiking and Landforms.

A sharp, narrow mountain ridge. It often results from the erosive activity of alpine glaciers flowing in adjacent valleys.
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[Fr.: "fish-bone"] 1. A sharp ridge. 2. (rock-climbing): a vertical corner in a rock face (sometimes useful as a handhold).
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A steep-sided, sharp-edged bedrock ridge formed by two glaciers eroding away on opposite sides of the ridge.
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