callus
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.
This entry comes from Encyclopædia Britannica Concise.
For the full entry on callus, visit Britannica.com.
Learn More About CALLUS
Seen & Heard 
What made you look up callus? Please tell us what you were reading, watching or discussing that led you here.
