#callosity__callus  an area of skin that is thick or hard from continual pressure or friction (as the sole of the foot)
  supertype:  #hardening.symptom  abnormal hardening or thickening of tissue
  subtype:  #clavus__corn  a hard thickening of the skin (especially on the top or sides of the toes) caused by the pressure of ill-fitting shoes

No statement uses or specializes #callosity; click here to add one.