单词 | callus |
释义 | callus /kal"euhs/, n. , pl. calluses, v. , callused, callusing. n. 1. Pathol. , Physiol. a. a hardened or thickened part of the skin; a callosity. b. a new growth of osseous matter at the ends of a fractured bone, serving to unite them. 2. Also, callose. Bot. a. the tissue that forms over the wounds of plants, protecting the inner tissues and causing healing. b. a deposit on the perforated area of a sieve tube. c. (in grasses) a tough swelling at the base of a lemma or palea. v.i. 3. to form a callus. v.t. 4. to produce a callus or calluses on: Heavy work callused his hands. [1555-65; < L callus, masc. var. of callum; see CALLOUS] |
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