1. A reference to "leg"; the part of the lower limb from the knee to the ankle.
2. An anatomic nomenclature for a leglike part.
3. Any of the various parts of the body or of an organ suggestive of a leg or to a pair of legs.
4. Either of the two bony processes forming the sides of the arch of the stapes or a stirrup-shaped bone in the middle ear.

The stapes transmits sound vibrations from the incus, another little bone in the middle ear, to the oval window adjacent to the inner ear.

The stapes is said to be the smallest bone in the body.

Stapes, a Late Latin word meaning "stirrup", cannot have been a classical Latin term because the Romans never rode with stirrups or even a saddle.