A handhold formed by wedging a finger in a crack in the rock.
〔登山〕（攀登时可供手指插入岩缝而轧住的）指锁
Example sentencesExamples
- I made a series of hand and finger jams up to a large flake that overrides the crack.
- An alternate finger jam can sometimes be formed where there is a constriction in the crack.