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Home > Glossary of climbing terms


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This page aims to describe terms and jargon related to climbing and mountaineering.

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1 A

1.1 Ablation zone

The area of a glacier where yearly melting meets or exceeds the annual snow fall.

1.2 Abseil

The process by which a climber may descend on a fixed rope. Also known as Rappel.

1.3 Aid climbing

A form of rock climbing that requires artificial assistance, i.e. ropes, to ascend.

1.4 Alpine start

To make an efficient start on a long climb by packing all your gear the previous evening and starting early in the morning, usually before sunrise.

1.5 Altitude sickness

A medical condition that is often observed at high altitudes. Also known as Acute mountain sickness, or AMS.

1.6 Anchor

A fail-safe attachment point for protection.

1.7 Approach

The path or route to the start of a technical climb. Although this is generally a walk or, at most, a scramble it is occasionally as hazardous as the climb itself.

1.8 Arête

The outside corner of rock. See also dihedral .

1.9 Ascender

A device for ascending on a rope. A mechanical ascender is called a jumar .

1.10 ATC

A proprietary type of belay device . ATC stands for Air traffic controller.

2 B

2.1 "B"-grade

A grading system for bouldering problems, invented by John Gill . Now largely superceeded by the "V" grading system .

2.2 Back-clipping

A hazardous mistake that can be made while lead climbing . The belay rope is clipped into a quickdraw in the wrong direction causing an increase in friction on the rope and an increase in the likelihood of the rope becoming unclipped during a fall.

2.3 Bail

To give up on a climb.

2.4 Belay

Protecting a climber from falling using a rope.

2.5 Belay device

A mechanical device used to create friction when belaying by putting bends in the rope. Many types of belay device exist, including ATC , grigri , Reverso, Sticht plate , eight , tuber , and the Munter hitch . Some belay devices may also be used as descenders .

2.6 Belay slave

Someone that volunteers for, or is tricked into, repeated belaying duties without partaking in any of the actual climbing.

2.7 Bergschrund

A crevasse that forms on the upper portion of a glacier where the moving section pulls away from the ice cap.

2.8 Beta

Advice and/or instructions on how to successfully complete a particular climbing route.

2.9 Beta flash

Ascent of a climb on the first attempt with some knowledge beta of that climb, with no falls or hangdogging . Also see on-sight .


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