| 单词 | callus |
| 释义 | callus(ˈkæləs) nounWord forms: plural -luses 1. Also called: callosity 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 verb 5. to produce or cause to produce a callus Word origin C16: from Latin, variant of callum hardened skin |
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