| 释义 |
callus
callusa thickening of the horny layer of the skin: You may have to go to a doctor to get that callus removed.
Not to be confused with:callous – unfeeling; emotionally hardened: She was so callous that she didn’t shed a tear when her husband died.cal·lus C0041100 (kăl′əs)n. pl. cal·lus·es 1. a. A localized thickening and enlargement of the horny layer of the skin. Also called callosity.b. The hard bony tissue that develops around the ends of a fractured bone during healing.2. Botany a. Undifferentiated tissue that develops on or around an injured or cut plant surface or in tissue culture.b. The hardened, sometimes sharp base of the spikelet of certain grasses.intr.v. cal·lused, cal·lus·ing, cal·lus·es To form or develop such hardened tissue. See Usage Note at callous.
[Latin, masculine of callum.]callus (ˈkæləs) n, pl -luses1. (Pathology) 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 pressure2. (Pathology) an area of bony tissue formed during the healing of a fractured bone3. (Botany) botany a. a mass of hard protective tissue produced in woody plants at the site of an injuryb. an accumulation of callose in the sieve tubes4. (Geological Science) biotechnology a mass of undifferentiated cells produced as the first stage in tissue culturevb (Botany) to produce or cause to produce a callus[C16: from Latin, variant of callum hardened skin]cal•lus (ˈkæl əs)
n., pl. -lus•es, n. 1. a. a hardened or thickened part of the skin; callosity. b. a new growth of osseous matter at the ends of a fractured bone, serving to unite them. 2. Also, callose. the tissue that forms over the wounds of plants, protecting the inner tissues and causing healing. v.i. 3. to form a callus. v.t. 4. to produce a callus or calluses on. [1555–65; < Latin] cal·lus (kăl′əs) An area of the skin that has become hardened and thick, usually because of prolonged pressure or rubbing.callus
Past participle: callused
Gerund: callusing
| Present |
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| I callus | | you callus | | he/she/it calluses | | we callus | | you callus | | they callus |
| Preterite |
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| I callused | | you callused | | he/she/it callused | | we callused | | you callused | | they callused |
| Present Continuous |
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| I am callusing | | you are callusing | | he/she/it is callusing | | we are callusing | | you are callusing | | they are callusing |
| Present Perfect |
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| I have callused | | you have callused | | he/she/it has callused | | we have callused | | you have callused | | they have callused |
| Past Continuous |
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| I was callusing | | you were callusing | | he/she/it was callusing | | we were callusing | | you were callusing | | they were callusing |
| Past Perfect |
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| I had callused | | you had callused | | he/she/it had callused | | we had callused | | you had callused | | they had callused |
| Future |
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| I will callus | | you will callus | | he/she/it will callus | | we will callus | | you will callus | | they will callus |
| Future Perfect |
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| I will have callused | | you will have callused | | he/she/it will have callused | | we will have callused | | you will have callused | | they will have callused |
| Future Continuous |
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| I will be callusing | | you will be callusing | | he/she/it will be callusing | | we will be callusing | | you will be callusing | | they will be callusing |
| Present Perfect Continuous |
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| I have been callusing | | you have been callusing | | he/she/it has been callusing | | we have been callusing | | you have been callusing | | they have been callusing |
| Future Perfect Continuous |
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| I will have been callusing | | you will have been callusing | | he/she/it will have been callusing | | we will have been callusing | | you will have been callusing | | they will have been callusing |
| Past Perfect Continuous |
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| I had been callusing | | you had been callusing | | he/she/it had been callusing | | we had been callusing | | you had been callusing | | they had been callusing |
| Conditional |
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| I would callus | | you would callus | | he/she/it would callus | | we would callus | | you would callus | | they would callus |
| Past Conditional |
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| I would have callused | | you would have callused | | he/she/it would have callused | | we would have callused | | you would have callused | | they would have callused |
callusThe healing tissue produced by plants to cover a wound resulting from a cut or other physical damage.Thesaurus| Noun | 1. | callus - an area of skin that is thick or hard from continual pressure or friction (as the sole of the foot)callosityhardening - abnormal hardening or thickening of tissueclavus, corn - a hard thickening of the skin (especially on the top or sides of the toes) caused by the pressure of ill-fitting shoes | | 2. | callus - bony tissue formed during the healing of a fractured bonechestnut - a small horny callus on the inner surface of a horse's legcicatrice, cicatrix, scar - a mark left (usually on the skin) by the healing of injured tissue | | 3. | callus - (botany) an isolated thickening of tissue, especially a stiff protuberance on the lip of an orchidphytology, botany - the branch of biology that studies plantsplant process, enation - a natural projection or outgrowth from a plant body or organ | | Verb | 1. | callus - cause a callus to form on; "The long march had callused his feet"harden, indurate - make hard or harder; "The cold hardened the butter" | | 2. | callus - form a callus or calluses; "His foot callused"harden, indurate - become hard or harder; "The wax hardened" |
Translationscallus
have calluses from patting (one's) own backTo have excessively praised oneself for an achievement or a job well done. Tony was instrumental in the success of the merger—or so he says. I bet he has calluses from patting his own back.See also: back, callus, have, own, pathave calluses from patting one's own back and break one's arm patting oneself on the backFig. to be a braggart. If you haven't heard about Bill's latest achievement, he'd be glad to tell you. He has calluses from patting his own back. Jane: I did a really wonderful job, if I do say so myself. Tom: If you're not careful, you'll break your arm patting yourself on the back.See also: back, callus, have, own, patSee callus
callus
callus: see corns and callusescorns and calluses,
thickenings of the outer layer of skin where there is irritation or constant pressure. Corns are cone-shaped with their points protruding into the dermis, or inner layer of skin. They usually have hard, shiny surfaces surrounded by red, painful areas.
..... Click the link for more information. .Callus (1) Tissue formed in plants on the surface of a wound (cracks, taps, the bases of cuttings, and areas of concrescence of stock and scion). A callus promotes the healing of wounds. Consisting of thin-walled parenchymal cells, a callus develops when there is cell division of any living tissue of the plant (cambium or phloem) in the peripheral zone of the pith, lying next to the protoxylem. Adventitious roots and buds, particularly with grafting, often develop in the callus. (2) Corpus callosum, an accumulation of callóse that obstructs the sieve plate when the sieve tubes of the phloem age. Use of the term in this sense is obsolete.
Callus a thickening of the horny layer of skin as a result of constant pressure or friction. Calluses usually appear on the palms, soles, and other parts of the body that are in constant contact with tough surfaces. The cracks formed on the surface of a callus may hinder one’s ability to work, and they can also be portals of entry for pyogenic microbes, resulting in such conditions as erysipelatous inflammations and phlegmons. 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. callus1. 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. Botanya. 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 callus
callus [kal´us] 1. localized hyperplasia of the horny layer of the epidermis due to pressure or friction.2. an unorganized network of woven bone formed about the ends of a broken bone; it is absorbed as repair is completed (provisional callus), and ultimately replaced by true bone (definitive callus). A fracture with callus formation (arrow) is demonstrated corresponding to the base of the second metatarsal. From Thrall and Ziessman, 2001.cal·lus (kal'ŭs), Avoid substituting the adjective callous for this noun. Avoid substituting the nonword calloused for the past participle callused.1. Synonym(s): callosity2. A composite mass of tissue that forms at a fracture site to establish continuity between the bone ends; it is composed initially of uncallused fibrous tissue and cartilage, and ultimately of bone. Synonym(s): fracture callus [L. hard skin] callus (kăl′əs)n. pl. cal·luses a. A localized thickening and enlargement of the horny layer of the skin. Also called callosity.b. The hard bony tissue that develops around the ends of a fractured bone during healing.intr.v. cal·lused, cal·lusing, cal·luses To form or develop such hardened tissue. See Usage Note at callous.callus Botany
Undifferentiated plant tissue produced at wound edge, callus tissue can be grown in vitro and induced to differentiate by varying the ratio of the hormones auxin and cytokinin in the medium.
Dermatology
Callosity, tyloma—A focus of hyperkeratotic skin secondary to repeated friction or pressure.
Orthopaedics
A mass of indurated bony trabeculae and cartilage formed by osteoblasts early in healing fractures.
Podiatry
A focus of indurated hyperkeratotic skin with a smooth centre, which is usually avascular, caused by rubbing or pressure; typically seen on the plantar aspect beneath the metatarsal head, as well as on the heel and Achilles tendon.
Aetiology
Increased intermittent pressure on the skin; abnormal varus or valgus of foot leading to uneven weight distribution; local bone defect (plantar flexed ray, heel spur), long metatarsal, extrinsic pressure (improper footwear); surgical scars or lacerations.
Management
Trimming of the hyperkeratosis to the central core, soaking (e.g., epsom salts), and shaved regularly; to redistribute weight-bearing, a full-sole orthotic, footwear change and a metatarsal pad or hammer-toe crest pad if needed.
Prevention
Properly fitted shoes.callus Callosity, tyloma Dermatology Localized hyperkeratosis of skin 2º to repeated friction or pressure Orthopedics A mass of indurated bony trabeculae and cartilage formed by osteoblasts early in healing fracturescal·lus (kal'ŭs) 1. Synonym(s): callosity. 2. A composite mass of tissue that forms at a fracture site to establish continuity between the bone ends; it is composed initially of uncallused fibrous tissue and cartilage, and ultimately of bone. callus (kal'us) [L., hardened skin]  CALLUS: (on the weight-bearing portion of the foot)1. A circumscribed thickening and hypertrophy of the horny layer of the skin. It may be oval or elongated, gray or brown, slightly elevated, with a smooth burnished surface. It appears on the flexor surfaces of hands and feet and is caused by friction, pressure, or other irritation. See: illustration Synonym: callosityTreatmentSalicylic acid or careful shaving will remove the callosity temporarily. Removal is made permanent only by elimination of the cause. 2. The osseous material woven between the ends of a fractured bone that is ultimately replaced by true bone during healing. See: porosisdefinitive callusThe exudate found between two ends of a fractured bone that develops into true bone.provisional callusA temporary deposit between the ends of a fractured bone that is reabsorbed when true bone develops.callus 1. A collection of partly calcified tissue, formed in the blood clot around the site of a healing fracture. Callus is readily visible on X-ray and indicates that healing is under way. 2. A skin thickening (see CALLOSITY). callus a mass of immature plant cells which can differentiate into mature tissues, depending upon the relative concentrations of plant growth hormones present. Callus can develop from EXPLANTS in laboratory tissue culture experiments but also occurs naturally at the end of cut or wounded surfaces of shoots and roots.CallusThickened skin due to chronic rubbing or irritation.Mentioned in: Lichen Simplex Chronicuscal·lus (kal'ŭs) 1. Synonym(s): callosity. 2. A composite mass of tissue that forms at a fracture site to establish continuity between the bone ends. LegalSeeCorncallus
Synonyms for callusnoun an area of skin that is thick or hard from continual pressure or friction (as the sole of the foot)SynonymsRelated Wordsnoun bony tissue formed during the healing of a fractured boneRelated Words- chestnut
- cicatrice
- cicatrix
- scar
noun (botany) an isolated thickening of tissue, especially a stiff protuberance on the lip of an orchidRelated Words- phytology
- botany
- plant process
- enation
verb cause a callus to form onRelated Wordsverb form a callus or callusesRelated Words |