callus: Meaning and Definition of


Pronunciation: (kal'us), [key]
— n., pl. v., -lus•es, -lused, -lus•ing.
    1. a hardened or thickened part of the skin; a callosity.
    2. a new growth of osseous matter at the ends of a fractured bone, serving to unite them.
    1. the tissue that forms over the wounds of plants, protecting the inner tissues and causing healing.
    2. a deposit on the perforated area of a sieve tube.
    3. (in grasses) a tough swelling at the base of a lemma or palea.
  1. to form a callus.
  1. to produce a callus or calluses on: Heavy work callused his hands.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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