callus Meaning, Definition & Usage

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

WordNet

Cal"lus noun
Etymology
L. See Callous.
Definitions
  1. (Med.) (a) Same as Callosity. (b The material of repair in fractures of bone; a substance exuded at the site of fracture, which is at first soft or cartilaginous in consistence, but is ultimately converted into true bone and unites the fragments into a single piece.
  2. (Hort.) The new formation over the end of a cutting, before it puts out rootlets.

Webster 1913