Anatomy and Zoology. The group of bones (five in humans, often fewer in quadrupeds) lying between the tarsus (ankle) and the phalanges (toes); the…

The ankle-bone or astragalus; also applied to an analogous part in birds and insects.

Applied also to the corresponding part of the leg itself; now esp. to the tibiotarsus of birds.

In birds, the third segment of the leg, the shank (which is rarely fleshy or feathered), corresponding to the mammalian tarsus and metatarsus…

Zoology. The intertarsal joint of the leg of a bird (corresponding to the hock of a quadruped). Now rare.

Short for tarso-metatarsal bone or ligament.

The bone formed by ankylosis of the tarsus and the metatarsus in birds and early reptilian types.

In various technical uses. Ornithology. An entire tarsal envelope characteristic of the legs of some birds.

the tibia of a bird's leg with the condyles formed by its fusion with the proximal bones of the tarsus.

= metatarsus, n. 1.