n. 皮肤的硬皮, 胼胝, (植物伤口的)愈合组织, 老茧

[医] 胼胝; 骨痂

Callus \Cal"lus\ (k[a^]l"l[u^]s), 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.