1. An area of skin that is thick or hard from continual pressure or friction (as the sole of the foot)
   "The guitarist developed calluses on his fingertips from playing";
   - callosity
    
2. Bony tissue formed during the healing of a fractured bone
   "The X-ray showed a callus forming at the site of the fracture"
    
3. (botany) an isolated thickening of tissue, especially a stiff protuberance on the lip of an orchid
   "The callus on the orchid's lip was a distinctive feature"

1. Form a callus or calluses
   "His foot callused"
    
2. Cause a callus to form on
   "The long march had callused his feet"

Sounds like: callous, Callas

Derived forms: callused, calluses, callusing

Type of: cicatrice, cicatrix, enation, harden, hardening, indurate, plant process, scar

Encyclopedia: Callus