callus

Noun
  1. An area of skin that is thick or hard from continual pressure or friction (as the sole of the foot) (synset 114387971)
    is a type of: hardening - abnormal hardening or thickening of tissue
    subtypes: 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
    same as: callosity
  2. Bony tissue formed during the healing of a fractured bone (synset 114387190)
    is a type of: cicatrice, cicatrix, scar - a mark left (usually on the skin) by the healing of injured tissue
    subtypes: chestnut - a small horny callus on the inner surface of a horse's leg
  3. (botany) an isolated thickening of tissue, especially a stiff protuberance on the lip of an orchid (synset 113109448)
    referred to in: botany, phytology - the branch of biology that studies plants
    is a type of: enation, plant process - a natural projection or outgrowth from a plant body or organ
Verb
  1. Cause a callus to form on (synset 200256766)
    "The long march had callused his feet"
    is a type of: harden, indurate - make hard or harder
  2. Form a callus or calluses (synset 200256638)
    "His foot callused"
    is a type of: harden, indurate - become hard or harder

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