knuckle

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knuckle

1. a joint of a finger, esp that connecting a finger to the hand
2. the cylindrical portion of a hinge through which the pin passes
3. an angle joint between two members of a structure

Knuckle

The part of a hinge containing the holes through which the pin passes.

knuckle

[′nək·əl]
(mining engineering)
The place on an incline where there is a sudden change in grade.

knuckle

One of the cylindrically projecting parts of a hinge through which the pin passes.
References in periodicals archive ?
Characteristic glove and stocking like hyperkeratotic (transgradience) with sharp margin hyperkeratotic plaques on the knee and ankles, slow progressive without remission, sclerodactyly, knuckle pads, hyperkeratotic plaques on the lips and onychogryphosis.
Hyperkeratotic plaques looking like knuckle pads were present on all proximal interphalangeal joints.