cal·lus /ˈkæləs/
 皮膚的硬結,胼胝,(植物傷口的)癒合組織
 cal·lus /ˈkæləs/ 名詞
 愈傷組織
 Cal·lus n.
 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.
 ◄ ►
 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"
      [also: calli (pl)]