callosity, callus (noun)

an area of skin that is thick or hard from continual pressure or friction (as the sole of the foot)

callus (noun)

bony tissue formed during the healing of a fractured bone

callus (verb)

(botany) an isolated thickening of tissue, especially a stiff protuberance on the lip of an orchid

callus (verb)

cause a callus to form on

"The long march had callused his feet"

callus (verb)

form a callus or calluses

"His foot callused"

callus (Noun)

A hardened area of the skin (especially on the foot or hand) caused by repeated friction, wear or use.

callus (Verb)

To form such hardened tissue

Callus

A callus is a toughened area of skin which has become relatively thick and hard in response to repeated friction, pressure, or other irritation. Rubbing that is too frequent or forceful will cause blisters rather than allow calluses to form. Since repeated contact is required, calluses are most often found on feet because of frequent walking. Calluses are generally not harmful, but may sometimes lead to other problems, such as skin ulceration or infection.

Callus

A callus is an area of thickened and sometimes hardened skin that forms as a response to repeated friction, pressure, or other irritation. Since repeated contact is required, calluses are most often found on the feet and hands, but they may occur anywhere on the skin. Some degree of callus, such as on the bottom of the foot, is normal.Calluses are generally not harmful and help prevent blisters, as well as offering protection. However, excessive formation may sometimes lead to other problems, such as a skin ulceration or infection, or cause the affected person to try to offload the affected painful area, which can place excessive stress on the asymptomatic side. Rubbing that is too frequent or forceful will cause blisters, as opposed to calluses, to form.