What is the meaning of Malleolus?

The bony prominence with a shape likened to a hammerhead, especially each of those at the distal end of the fibula or tibia, on either side of the ankle joint.

diminutive of malleus:

  1. A small hammer or mallet.
  2. A hammer-shaped slip, a mallet-shoot.
  3. A kind of fire-dart.
  4. The tongue of a shoe buckle.

A small hammer or mallet.

A hammer-shaped slip, a mallet-shoot.

A kind of fire-dart.

The tongue of a shoe buckle.

Source: wiktionary.org