English-Polish translations for callus

A hardened area of the skin caused by repeated friction, wear or use
The material of repair in fractures of bone; a substance exuded at the site of fracture, which is at first soft or cartilaginous in consistency, but is ultimately converted into true bone and unites the fragments into a single piece
A shining area on the frons of many species of Tabanomorpha (horse flies and relatives
To form such hardened tissue

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