calli
      See callus


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