callus (redirected from Calus)

callus: see corns and calluses.

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callus

In botany, soft tissue that forms over a wounded or cut plant surface, leading to healing. A callus arises from cells of the cambium. When a callus forms, some of its cells may organize into growing points, some of which in turn give rise to roots while others produce stems and leaves. Thus a callus may be capable of regenerating an entire plant.

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callus

1. an area of skin that is hard or thick, esp on the palm of the hand or sole of the foot, as from continual friction or pressure

2. an area of bony tissue formed during the healing of a fractured bone

3. Botany

a. a mass of hard protective tissue produced in woody plants at the site of an injury

b. an accumulation of callose in the sieve tubes

4. Biotechnology a mass of undifferentiated cells produced as the first stage in tissue culture

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callus [′kal·əs]

(botany)

A thickened callose deposit on sieve plates.

A hard tissue that forms over a damaged plant surface.

(medicine)

Hard, thick area on the surface of the skin.