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callus

[kal-uh s]
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noun, plural cal·lus·es.
  1. Pathology, Physiology.
    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.
  2. Also callose. Botany.
    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.
verb (used without object), cal·lused, cal·lus·ing.
  1. to form a callus.
verb (used with object), cal·lused, cal·lus·ing.
  1. to produce a callus or calluses on: Heavy work callused his hands.

Origin of callus

1555–65; < Latin callus, masculine variant of callum; see callous
Related formsun·cal·lused, adjective
Can be confusedcallous callus
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for callusing

Historical Examples

  • Callusing can then take place in time to allow of fall planting.

    The Nursery Book

    Liberty Hyde Bailey

  • It is usually better, however, to place them for several weeks in a callusing bed before planting.

  • They are, therefore, stratified in a callusing bed where moisture and temperature can be controlled.

  • If cuttings are buried so deep that they cannot sprout, callusing may be hastened by placing them in a mild temperature.

    The Nursery Book

    Liberty Hyde Bailey


British Dictionary definitions for callusing

callus

noun plural -luses
  1. Also called: callosity an area of skin that is hard or thick, esp on the palm of the hand or sole of the foot, as from continual friction or pressure
  2. an area of bony tissue formed during the healing of a fractured bone
  3. botany
    1. a mass of hard protective tissue produced in woody plants at the site of an injury
    2. an accumulation of callose in the sieve tubes
  4. biotechnology a mass of undifferentiated cells produced as the first stage in tissue culture
verb
  1. to produce or cause to produce a callus

Word Origin

C16: from Latin, variant of callum hardened skin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for callusing

callus

n.

"hardened skin," 1560s, from Latin callus, variant of callum "hard skin," related to callere "be hard," from PIE root *kal- "hard" (cf. Sanskrit kalika "bud," Old Irish calath "hard," Old Church Slavonic kaliti "to cool, harden").

Online Etymology Dictionary, © 2010 Douglas Harper

callusing in Medicine

callus

(kăləs)
n. pl. cal•lus•es
  1. callosity
  2. The hard bony tissue that develops around the ends of a fractured bone during healing.

callusing in Science

callus

[kăləs]
  1. An area of the skin that has become hardened and thick, usually because of prolonged pressure or rubbing.
  2. The hard bony tissue that develops around the ends of a fractured bone during healing.