Callus definitions

noun

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

See also: callosity

noun

bony tissue formed during the healing of a fractured bone

noun

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

verb

cause a callus to form on; "The long march had callused his feet"

verb

form a callus or calluses; "His foot callused"