noun, plural cal·lus·es.
- a hardened or thickened part of the skin; a callosity.
- a new growth of osseous matter at the ends of a fractured bone, serving to unite them.
- the tissue that forms over the wounds of plants, protecting the inner tissues and causing healing.
- a deposit on the perforated area of a sieve tube.
- (in grasses) a tough swelling at the base of a lemma or palea.
verb (used without object), cal·lused, cal·lus·ing.
verb (used with object), cal·lused, cal·lus·ing.
Origin of callus
Related Words for callusconform, strengthen, stupefy, discipline, inure, develop, callous, acclimatize, adapt, habituate, stun, steel, embitter, season, train, numb, deaden, teach, dull, stiffen
Examples from the Web for callus
Historical Examples of callus
There's naething in the whiskey to prevent the proper formation of callus.Charles O'Malley, The Irish Dragoon, Volume 2 (of 2)
The callus of the third glume is short, pointed and villous.
The callus is long, acute, bearded with reddish-brown hairs.
There was also some callus on the posterior surface of the lower end of the humerus.Castes and Tribes of Southern India
The formation of callus in fractured limbs was also increased.Poisons: Their Effects and Detection
Alexander Wynter Blyth
noun plural -luses
- a mass of hard protective tissue produced in woody plants at the site of an injury
- an accumulation of callose in the sieve tubes
Word Origin for callus
"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").