#1 callus n. [callosity] an area of skin that is thick or hard from continual pressure or friction (as the sole of the foot). wn
#2 callus v. cause a callus to form on; "The long march had callused his feet". wn
#3 callus n. bony tissue formed during the healing of a fractured bone. wn
#4 callus v. form a callus or calluses; "His foot callused". wn
#5 callus n. (botany) an isolated thickening of tissue, especially a stiff protuberance on the lip of an orchid. wn
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