Hypertext Webster Gateway: "callus"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Callus \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.
From WordNet (r) 1.7 (wn)
callus
n 1: an area of skin that is thick or hard from continual
pressure or friction (as the sole of the foot) [syn: {callosity}]
2: bony tissue formed during the healing of a fractured bone
3: (botany) an isolated thickening of tissue, especially a
stiff protuberance on the lip of an orchid
v 1: cause a callus to form on; "The long march had callused his
feet"
2: form a callus or calluses; "His foot callused"
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