| 释义 |
helix
 helixin a right circular cylinderhe·lix H0133100 (hē′lĭks)n. pl. he·lix·es or hel·i·ces (hĕl′ĭ-sēz′, hē′lĭ-) 1. Mathematics A three-dimensional curve that lies on a cylinder or cone, so that its angle to a plane perpendicular to the axis is constant.2. A spiral form or structure.3. Anatomy The folded rim of skin and cartilage around most of the outer ear.4. Architecture A volute on a Corinthian or Ionic capital.v. he·lixed, he·lix·ing, he·lix·es v.tr. To move or position (something) into the shape of a helix.v.intr.1. To have the shape of a helix.2. To move along a helical course; spiral.
[Latin, from Greek; see wel- in Indo-European roots.]helix (ˈhiːlɪks) n, pl helices (ˈhɛlɪˌsiːz) or helixes1. (Mathematics) a curve that lies on a cylinder or cone, at a constant angle to the line segments making up the surface; spiral2. a spiral shape or form3. (Anatomy) the incurving fold that forms the margin of the external ear4. (Architecture) another name for volute25. (Animals) any terrestrial gastropod mollusc of the genus Helix, which includes the garden snail (H. aspersa)[C16: from Latin, from Greek: spiral; probably related to Greek helissein to twist]he•lix (ˈhi lɪks)
n., pl. hel•i•ces (ˈhɛl əˌsiz)
he•lix•es. 1. a spiral. 2. the curve formed by a straight line drawn on a plane when that plane is wrapped around a cylindrical surface, esp. a right circular cylinder, as the curve of a screw. 3. a spiral, scroll-like architectural ornament, as a volute on a Corinthian capital. 4. the curved fold forming most of the rim of the external ear. 5. alpha helix. [1555–65; < Latin: a spiral, a kind of ivy < Greek hélix anything twisted] he·lix (hē′lĭks)1. A three-dimensional spiral curve. In mathematical terms, a helix can be described as a curve turning about an axis on the surface of a cylinder or cone while rising at a constant upward angle from a base.2. Something, such as a strand of DNA, having a spiral shape.Thesaurus| Noun | 1. |  helix - a curve that lies on the surface of a cylinder or cone and cuts the element at a constant anglespiralcurve, curved shape - the trace of a point whose direction of motion changesdouble helix - a pair of parallel helices intertwined about a common axis; "the shape of the DNA molecule is a double helix" | | 2. |  helix - a structure consisting of something wound in a continuous series of loops; "a coil of rope"coil, volute, whorl, spiralhank - a coil of rope or wool or yarnstructure, construction - a thing constructed; a complex entity constructed of many parts; "the structure consisted of a series of arches"; "she wore her hair in an amazing construction of whirls and ribbons" | | 3. | Helix - type genus of the family Helicidaegenus Helixmollusk genus - a genus of mollusksfamily Helicidae, Helicidae - land snails including the common edible snail and some pestsedible snail, Helix pomatia - one of the chief edible snailsgarden snail - any of several inedible snails of the genus Helix; often destructive pestsbrown snail, Helix aspersa - serious garden pest having a brown shell with paler zigzag markings; nearly cosmopolitan in distributionHelix hortensis - a kind of garden snail |
helixnoun spiral, twist, curl, loop, coil, corkscrew, gyre (literary), curlicue, volute (technical) Coil the fibre into a helix.TranslationsWendelhélicehélicehélixelicaelicespiralevolutahelix
helix1. a curve that lies on a cylinder or cone, at a constant angle to the line segments making up the surface; spiral 2. the incurving fold that forms the margin of the external ear 3. another name for volute4. any terrestrial gastropod mollusc of the genus Helix, which includes the garden snail (H. aspersa) HelixAny spiral form, particularly a small volute or twist under the abacus of the Corinthian capital.   helix[′hē‚liks] (electricity) A spread-out, single-layer coil of wire, either wound around a supporting cylinder or made of stiff enough wire to be self-supporting. (mathematics) A curve traced on a cylindrical or conical surface where all points of the surface are cut at the same angle. (cell and molecular biology) A spiral structure with a repeating pattern that characterizes many biological polymers, for example, double-stranded nucleic acids and proteins.
Helix[′hē‚liks] (invertebrate zoology) A genus of pulmonate land mollusks including many of the edible snails; individuals have a coiled shell with a low conical spire. helix  helix, 1: H 1. Any spiral, particularly a small volute or twist under the abacus of the Corinthian capital.2. The volute of an Ionic capital.HelixA hardware description language from Silvar-Lisco.helix
helix [he´liks] (pl. he´lices, helixes) (Gr.) 1. a winding structure; see also coil and spiral.2. the superior and posterior free margin of the pinna of the ear.α-helix (alpha helix) the complex structural arrangement of parts of protein molecules in which a single polypeptide chain forms a right-handed helix.double helix (Watson-Crick helix) the structure of deoxyribonucleic acid (DNA), consisting of two coiled chains, each of which contains information completely specifying the other chain.he·lix, pl. hel·i·ces (hē'liks, hel'i-sēz), [TA] Do not confuse this word with spiral.1. The margin of the auricle; a folded rim of cartilage forming the upper part of the anterior, the superior, and the greater part of the posterior edges of the auricle. 2. A line in the shape of a coil (or a spring, or the threads on a bolt), each point being equidistant from a straight line that is the axis of the cylinder in which each point of the helix lies. [L. fr. G. helix, a coil] helix (hē′lĭks)n. pl. he·lixes or helices (hĕl′ĭ-sēz′, hē′lĭ-) 1. Mathematics A three-dimensional curve that lies on a cylinder or cone, so that its angle to a plane perpendicular to the axis is constant.2. A spiral form or structure.3. Anatomy The folded rim of skin and cartilage around most of the outer ear.4. Architecture A volute on a Corinthian or Ionic capital.v. he·lixed, he·lixing, he·lixes v.tr. To move or position (something) into the shape of a helix.v.intr.1. To have the shape of a helix.2. To move along a helical course; spiral.Anatomy The superior and posterior free margin of the pinna of the ear
Molecular biology A winding structural motif for nucleic acids and proteinshe·lix, pl. helixes, pl. helices (hē'liks, -ĕz, hel'i-sēz) 1. [TA] The margin of the auricle; a folded rim of cartilage forming the upper part of the anterior, the superior, and the greater part of the posterior edges of the auricle. 2. A line in the shape of a coil (or a spring, or the threads on a bolt), each point being equidistant from a straight line that is the axis of the cylinder in which each point of the helix lies. usage note: Often mistakenly applied to a spiral. [L. fr. G. helix, a coil]helix The folded margin of the outer ear. The form of the helix is determined by the underlying cartilage.helix (pl. helixes or helices) a form of spiral in which any point is at the same distance from the central axis. RNA molecules have a single helix, DNA is a double helix.HELIX
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helix
Synonyms for helixnoun spiralSynonyms- spiral
- twist
- curl
- loop
- coil
- corkscrew
- gyre
- curlicue
- volute
Synonyms for helixnoun a curve that lies on the surface of a cylinder or cone and cuts the element at a constant angleSynonymsRelated Words- curve
- curved shape
- double helix
noun a structure consisting of something wound in a continuous series of loopsSynonymsRelated Words- hank
- structure
- construction
noun type genus of the family HelicidaeSynonymsRelated Words- mollusk genus
- family Helicidae
- Helicidae
- edible snail
- Helix pomatia
- garden snail
- brown snail
- Helix aspersa
- Helix hortensis
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