Definitions for: Callus


[n] (botany) an isolated thickening of tissue, especially a stiff protuberance on the lip of an orchid
[n] bony tissue formed during the healing of a fractured bone
[n] an area of skin that is thick or hard from continual pressure or friction (as the sole of the foot)
[v] form a callus or calluses; "His foot callused"
[v] cause a callus to form on; "The long march had callused his feet"



Webster (1913) Definition: Cal"lus, n. [L. See Callous.]
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.

Synonyms: callosity

See Also: chestnut, cicatrice, cicatrix, clavus, corn, enation, harden, hardening, indurate, plant process, scar

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