Knuckles, the dorsal crenulations (bumps) of the
gray whale where most whales have a dorsal fin
Knuckle-walking, a form of quadrupedal walking in which the forelimbs hold the fingers in a partially flexed posture that allows body weight to press down on the ground through the knuckle
Pork knuckle, a part of a pig's leg used as the basis of the traditional German dish
Eisbein
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