| 释义 |
cuticle
cu·ti·cle C0826400 (kyo͞o′tĭ-kəl)n.1. The outermost layer of the skin of vertebrates; epidermis.2. The strip of hardened skin at the base and sides of a fingernail or toenail.3. Dead or cornified epidermis.4. Zoology The noncellular, hardened or membranous protective covering of many invertebrates, such as the transparent membrane that covers annelids.5. Botany The layer of cutin covering the epidermis of the aerial parts of plants.
[Latin cutīcula, diminutive of cutis, skin; see (s)keu- in Indo-European roots.]
cu·tic′u·lar (-tĭk′yə-lər) adj.cuticle (ˈkjuːtɪkəl) n1. (Anatomy) dead skin, esp that round the base of a fingernail or toenail2. (Anatomy) another name for epidermis3. (Anatomy) any covering layer or membrane4. (Botany) the protective layer, containing cutin, that covers the epidermis of higher plants5. (Zoology) the hard protective layer covering the epidermis of many invertebrates[C17: from Latin cutīcula diminutive of cutis skin] cuticular adjcu•ti•cle (ˈkyu tɪ kəl)
n. 1. the hardened skin that surrounds the edges of a fingernail or toenail. 2. the epidermis. 3. the outer, noncellular layer of the arthropod integument. 4. a very thin waxy film covering the surface of plants, derived from the outer surfaces of the epidermal cells. [1605–15; < Latin cutīcula the skin =cuti(s) skin, cutis + -cula -cle1] cu•tic′u•lar (-ˈtɪk yə lər) adj. cu·ti·cle (kyo͞o′tĭ-kəl)1. The outer layer of skin; the epidermis.2. The hard skin around the sides and base of a fingernail or toenail.3. Botany A waxy layer that covers the outermost tissue layer of a plant. The cuticle is secreted by the epidermis and helps prevent water loss and infection by parasites.cuticle1. A waterproof, waxy outer covering found, for example, on leaves and insects.2. Epidermis; dead skin at a nail root.Thesaurus| Noun | 1. | cuticle - the dead skin at the base of a fingernail or toenailcutis, skin, tegument - a natural protective body covering and site of the sense of touch; "your skin is the largest organ of your body" | | 2. |  cuticle - the outer layer of the skin covering the exterior body surface of vertebratesepidermiscutis, skin, tegument - a natural protective body covering and site of the sense of touch; "your skin is the largest organ of your body"epidermal cell - any of the cells making up the epidermiscorneum, horny layer, stratum corneum - the outermost layer of the epidermis consisting of dead cells that slough offstratum lucidum - the layer of epidermis immediately under the stratum corneum in the skin of the palms and solesstratum granulosum - the layer of epidermis just under the stratum corneum or (on the palms and soles) just under the stratum lucidum; contains cells (with visible granules) that die and move to the surfacemalpighian layer, rete Malpighii, stratum basale, stratum germinativum - the innermost layer of the epidermispallium, mantle - (zoology) a protective layer of epidermis in mollusks or brachiopods that secretes a substance forming the shellstratum - one of several parallel layers of material arranged one on top of another (such as a layer of tissue or cells in an organism or a layer of sedimentary rock) | | 3. |  cuticle - hard outer covering or case of certain organisms such as arthropods and turtlescarapace, shell, shieldturtle - any of various aquatic and land reptiles having a bony shell and flipper-like limbs for swimmingarthropod - invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitincuticula - the outer body wall of an insectscute - large bony or horny plate as on an armadillo or turtle or the underside of a snakemollusc, mollusk, shellfish - invertebrate having a soft unsegmented body usually enclosed in a shellshell - the material that forms the hard outer covering of many animals |
Translationscuticle (ˈkjuːtikl) noun the dead skin at the inner edge of a fingernail or toenail. 表皮 表皮cuticle
cuticle1. dead skin, esp that round the base of a fingernail or toenail 2. another name for epidermis3. any covering layer or membrane 4. the protective layer, containing cutin, that covers the epidermis of higher plants 5. the hard protective layer covering the epidermis of many invertebrates Cuticle (1) In animals, a solid formation on the surface of cells of epithelial tissue. In invertebrates, a derivative of cells of the single-layered integumental epithelium, or hypodermis. The functions of the cuticle are chiefly protective and supportive. In worms and arthropods, it forms a tough body covering. The composition of cuticle includes chitin (which, together with mineral substances and proteins, provides mechanical strength) and lipids (which make the cuticle impervious to water). In vertebrates, which have a multilayered integumental epithelium to perform the protective function, the cuticle is found mainly on the surface of the epithelial cells that line the viscera (the intestines, the air passages of the respiratory organs, parts of the uriniferous tubules of the kidneys, and the urinary tracts). Each cell has its own cuticle, which is represented completely by the microvilli (the surface of a single cell of the small intestine in man having as many as 2,000). The activity of certain enzymes (for example, alkaline phosphatase, invertases, and maltases) has been discovered in the cuticle, testifying to the active participation of the cuticle in the functional activities of the organs. (2) In plants, the cuticle is the thin protective film covering the epidermis of the leaves and stems and consisting of cutin. The cuticle is an unstructured formation, lacking corpuscular or fibrillar elements. It is resistant to chemical influences. It is absent in the underwater organs of aquatic plants, and it is poorly developed in plants that live in shade or damp soil. It is especially well developed in plants that must limit transpiration. The smooth, shiny cuticle of the leaves of tropical plants reflects some of the sunlight striking the plants and serves as a shield against excessive insolation. In many xerophytes, the protective properties of the epidermis are reinforced beneath the cuticle by a cuticular layer, which consists of a mixture of polysaccharides, cutin, and waxes. In the majority of xerophytes, the cuticular layer holds pale yellow pigments, which help make the cell wall impenetrable to ultraviolet rays. M. E. ASPIZ cuticle[′kyüd·ə·kəl] (anatomy) The horny layer of the nail fold attached to the nail plate at its margin. (biology) A noncellular, hardened or membranous secretion of an epithelial sheet, such as the integument of nematodes and annelids, the exoskeleton of arthropods, and the continuous film of cutin on certain plant parts. cuticle
cuticle [ku´tĭ-k'l] 1. a layer of more or less solid substance covering the free surface of an epithelial cell.2. the narrow band of epidermis extending from the nail wall onto the nail surface; called also eponychium and perionychium.enamel cuticle primary cuticle.primary cuticle a film on the enamel of unerupted teeth, considered to be the final product of degenerating ameloblasts after completion of enamel formation. Called also enamel cuticle and Nasmyth's membrane.cu·ti·cle (kyū'ti-kil), 1. An outer thin layer, usually horny. Synonym(s): cuticula (1) 2. The layer, chitinous in some invertebrates, which occurs on the surface of epithelial cells. 3. Synonym(s): epidermis [L. cuticula, dim. of cutis, skin] cuticle (kyo͞o′tĭ-kəl)n.1. The outermost layer of the skin of vertebrates; epidermis.2. The strip of hardened skin at the base and sides of a fingernail or toenail.3. Dead or cornified epidermis.4. Zoology The noncellular, hardened or membranous protective covering of many invertebrates, such as the transparent membrane that covers annelids.5. Botany The layer of cutin covering the epidermis of the aerial parts of plants.
cu·tic′u·lar (-tĭk′yə-lər) adj.cu·ti·cle (kyū'ti-kĕl) 1. An outer thin layer, usually of a horny composition.
Synonym(s): cuticula (1) . 2. The layer, chitinous in some invertebrates, which occurs on the surface of epithelial cells. 3. Synonym(s): epidermis. [L. cuticula, dim. of cutis, skin]cuticle 1. The epidermis or outer layer of the skin. 2. The narrow strip of thickened epidermis at the base of a fingernail or toenail. 3. The sheath of a hair follicle. cuticle - in both animals and plants, a thin noncellular layer secreted by the epidermis. In higher plants it covers all the exterior, except where stomata and lenticels occur, and prevents water loss (cuticularization). In many arthropods, it forms part of the EXOSKELETON and is composed of CHITIN and PROTEIN, with a calcareous element in CRUSTACEANS.
- the epidermal cells of vertebrates (the stratum corneum) that have been converted to KERATIN (as in hair, feathers, scales, nails, claws, hooves, horns, etc.), giving proofing against water loss, bacterial entry and ultraviolet light.
cu·ti·cle (kyū'ti-kĕl) An outer thin layer, usually horny. [L. cuticula, dim. of cutis, skin]cuticle
Synonyms for cuticlenoun the dead skin at the base of a fingernail or toenailRelated Wordsnoun the outer layer of the skin covering the exterior body surface of vertebratesSynonymsRelated Words- cutis
- skin
- tegument
- epidermal cell
- corneum
- horny layer
- stratum corneum
- stratum lucidum
- stratum granulosum
- malpighian layer
- rete Malpighii
- stratum basale
- stratum germinativum
- pallium
- mantle
- stratum
noun hard outer covering or case of certain organisms such as arthropods and turtlesSynonymsRelated Words- turtle
- arthropod
- cuticula
- scute
- mollusc
- mollusk
- shellfish
- shell
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