Callus

[Sarah]

The material of repair in fractures of bone; a substance exudedat the site of fracture, which is at first soft or cartilaginous inconsistence, but is ultimately converted into true bone and unitesthe fragments into a single piece.

[Vania]

A thickened and hardened part of the skin or soft tissue, especially in an area that has been subjected to friction.

[Ernesto]

an area of hard skin, especially on the feet or hands: