Dictionary of Human Evolution and Biology

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1. lateral bone of the lower leg that articulates at its proximal end with the tibia (but is not part of the knee joint) and with the tarsus at its distal end; it is not a weight-bearing bone. In some primates, the fibula and tibia are fused for part of their length. Aka brace bone.

2. the bone in an animal that is ankylosed with the tibia.

See ankylosis. Adjective: fibular. Plural: fibulae.

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