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单词 magnet
释义

magnet


magnet

a thing or person that attracts: The race track is a magnet for compulsive gamblers.; a thing that has the property of attracting certain substances, such as iron or stainless steel: She puts notes on the refrigerator with a magnet.; a lodestone
Not to be confused with:magnate – a person of great influence, importance, or standing in a particular enterprise: a hotel magnate; a person of distinction: a literary magnate

mag·net

M0028600 (măg′nĭt)n.1. An object that is surrounded by a magnetic field and that has the property, either natural or induced, of attracting iron or steel.2. An electromagnet.3. A person, a place, an object, or a situation that exerts attraction: a village that is a magnet for tourists.
[Middle English magnes, magnet, ultimately (probably partially via Old French magnete) from Latin magnēs, magnēt-, from Greek Magnēs (lithos), Magnesian (stone), magnet, after Magnēsiā, a region of Thessaly, or Magnēsiā, a city in ancient Lydia.]

magnet

(ˈmæɡnɪt) n1. (General Physics) a body that can attract certain substances, such as iron or steel, as a result of a magnetic field; a piece of ferromagnetic substance. See also electromagnet2. a person or thing that exerts a great attraction[C15: via Latin from Greek magnēs, shortened from ho Magnēs lithos the Magnesian stone. See magnesia]

mag•net

(ˈmæg nɪt)

n. 1. a body, as a piece of iron or steel, that possesses the property of attracting certain substances, as iron. 2. lodestone (defs. 1, 2). 3. a thing or person that attracts. [1400–50; < Old French < Latin magnēt-, s. of magnēs < Greek for (hē) Mágnēs (líthos) (the stone) of Magnesia]

mag·net

(măg′nĭt)1. A rock, piece of metal, or other solid that has the property of attracting iron or steel. A lodestone is a natural magnet, but most magnets today are made by inducing magnetism in a material such as steel or a metal alloy. Magnets have two magnetic poles, called north and south.2. An electromagnet.

magnet

A substance able to attract iron and which produces a magnetic field.
Thesaurus
Noun1.magnet - (physics) a device that attracts iron and produces a magnetic fieldmagnet - (physics) a device that attracts iron and produces a magnetic fieldbar magnet - a magnet in the form of a bar with magnetic poles at each endcore - a bar of magnetic material (as soft iron) that passes through a coil and serves to increase the inductance of the coildevice - an instrumentality invented for a particular purpose; "the device is small enough to wear on your wrist"; "a device intended to conserve water"electromagnet - a temporary magnet made by coiling wire around an iron core; when current flows in the coil the iron becomes a magnetfield magnet - a magnet that provides a magnetic field in a dynamo or electric motormagnetic needle - a slender magnet suspended in a magnetic compass on a mounting with little friction; used to indicate the direction of the earth's magnetic poleparamagnet - magnet made of a substance whose magnetization is proportional to the strength of the magnetic field applied to itpermanent magnet, static magnet - a magnet that retains its magnetism after being removed from a magnetic fieldmagnetic pole, pole - one of the two ends of a magnet where the magnetism seems to be concentratedsolenoid - a coil of wire around an iron core; becomes a magnet when current passes through the coilnatural philosophy, physics - the science of matter and energy and their interactions; "his favorite subject was physics"
2.magnet - a characteristic that provides pleasure and attractsmagnet - a characteristic that provides pleasure and attracts; "flowers are an attractor for bees"attractive feature, attractor, attracter, attractioncharacteristic, feature - a prominent attribute or aspect of something; "the map showed roads and other features"; "generosity is one of his best characteristics"attention - a general interest that leads people to want to know more; "She was the center of attention"tourist attraction - a characteristic that attracts tourists
Translations
磁铁

magnet

(ˈmӕgnit) noun a piece of iron, or of certain other materials, that attracts or repels other pieces of iron etc. 磁鐵 磁铁magˈnetic (-ˈne-) adjective1. of, or having the powers of, or operating by means of, a magnet or magnetism. magnetic force. 有磁性的 有磁性的2. strongly attractive. a magnetic personality. 深具吸引力的 有吸引力的magˈnetically adverb 有磁性地，深深吸引地 有磁性地，有魅力地 ˈmagnetism noun1. power of attraction. his personal magnetism. 魅力，吸引力 魅力2. (the science of) magnets and their power of attraction. the magnetism of the earth. 磁力磁學 磁学ˈmagnetize, ˈmagnetise verb1. to make magnetic. You can magnetize a piece of iron. 磁化 磁化2. to attract or influence strongly. She's the kind of person who can magnetize others. 深深吸引，感染 紧紧吸引，感染 magnetic field the area in which the pull of a magnet, or thing acting like a magnet, is felt. the earth's magnetic field. 磁場 磁场magnetic north the direction, either east or west of the true north, in which a magnetized needle points. 磁北極 磁北

magnet

→ 磁铁zhCN

magnet


babe magnet

1. A person, typically male, who is very attractive to women. Often used with a degree of humor or facetiousness. Primarily heard in US, South Africa. John thinks he's such a babe magnet now that he's making so much money, but everyone thinks he's just as foolish as ever.2. Something that attracts women to its owner, who is typically male. Often used with a degree of humor or facetiousness. Primarily heard in US, South Africa. I bought my motorcycle because I thought it would be a great babe magnet.See also: babe, magnet

chick magnet

1. A person, typically male, who is very attractive to women. Often used with a degree of humor or facetiousness. John thinks he's such a chick magnet now that he's making so much money, but everyone thinks he's just as foolish as ever.2. Something that attracts women to its owner, who is typically male. Often used with a degree of humor or facetiousness. I bought my motorcycle because I thought it would be a great chick magnet.See also: chick, magnet

nerd magnet

slang Someone who seems to attract the romantic attention of a socially awkward or inept person, especially one obsessed or preoccupied with some specific, typically niche subject. Ever since I joined the high school jazz band, I turned into this major nerd magnet—all the dorky girls in there keep flocking to me in between classes! I wouldn't sign up to learn Japanese unless you want to end up a total nerd magnet.See also: magnet, nerd

babe magnet

and chick magnet1. n. a male who seems to attract good looking females easily. Keep your woman away from Chuck. He’s a babe magnet. Wilfred thinks he’s a chick magnet, but he only snags the dogs. 2. n. something, such as a car, that attracts good-looking females to a male. Man, I like your new chick magnet. Get any yet? He thought of a new car as a “babe magnet,” but all it drew was the repo man. See also: babe, magnet

chick magnet

verbSee babe magnetSee also: chick, magnet

nerd magnet

n. a girl or woman who attracts dull males. Sally is weary of dating total drips. She is a classic nerd magnet. See also: magnet, nerd

magnet


magnet:

see electromagnetelectromagnet,
device in which magnetism is produced by an electric current. Any electric current produces a magnetic field, but the field near an ordinary straight conductor is rarely strong enough to be of practical use.
..... Click the link for more information. ; magnetismmagnetism,
force of attraction or repulsion between various substances, especially those made of iron and certain other metals; ultimately it is due to the motion of electric charges.
..... Click the link for more information. .

Magnet

An object or device that produces a magnetic field. Magnets are essential for the generation of electric power and are used in motors, generators, labor-saving electromechanical devices, information storage, recording, and numerous specialized applications, for example, seals of refrigerator doors. The magnetic fields produced by magnets apply a force at a distance on other magnets, charged particles, electric currents, and magnetic materials.

Magnets may be classified as either permanent or excited. Permanent magnets are composed of so-called hard magnetic material, which retains an alignment of the magnetization in the presence of ambient fields. Excited magnets use controllable energizing currents to generate magnetic fields in either electromagnets or air-cored magnets. See Ferromagnetism, Superconductivity

The essential characteristic of permanent-magnet materials is an inherent resistance to change in magnetization over a wide range of field strength. Resistance to change in magnetization in this type of material is due to two factors: (1) the material consists of particles smaller than the size of a domain, a circumstance which prevents the gradual change in magnetization which would otherwise take place through the movement of domain wall boundaries; and (2) the particles exhibit a marked magnetocrystalline anisotropy. During manufacture the particles are aligned in a magnetic field before being sintered or bonded in a soft metal or polyester resin. Compounds of neodymium, iron, and boron are used.

Electromagnets rely on magnetically soft or permeable materials which are well annealed and homogeneous so as to allow easy motion of domain wall boundaries. Ideally the coercive force should be zero, permeability should be high, and the flux density saturation level should be high. Coincidentally the hysteresis energy loss represented by the area of the hysteresis curve is small. This property and high electrical resistance (for the reduction of eddy currents) are required where the magnetic field is to vary rapidly. This is accomplished by laminating the core and using iron alloyed with a few percent silicon that increases the resistivity.

Electromagnets usually have an energizing winding made of copper and a permeable iron core. Applications include relays, motors, generators, magnetic clutches, switches, scanning magnets for electron beams (for example, in television receivers), lifting magnets for handling scrap, and magnetic recording heads.

Special iron-cored electromagnets designed with highly homogeneous fields are used for special analytical applications in, for example, electron or nuclear magnetic resonance, or as bending magnets for particle accelerators. See Magnetic resonance, Particle accelerator

Air-cored electromagnets are usually employed above the saturation flux density of iron (about 2 T); at lower fields, iron-cored magnets require much less power because the excitation currents needed then are required only to generate a small field to magnetize the iron. The air-cored magnets are usually in the form of a solenoid with an axial hole allowing access to the high field in the center. The conductor, usually copper or a copper alloy, must be cooled to dissipate the heat generated by resistive losses. In addition, the conductor and supporting structure must be sufficiently strong to support the forces generated in the magnet.

In pulsed magnets, higher fields can be generated by limiting the excitation to short pulses (usually furnished by the energy stored in a capacitor bank) and cooling the magnet between pulses. The highest fields are generally achieved in small volumes. A field of 75 T has been generated for 120 microseconds.

Large-volume or high-field magnets are often fabricated with superconducting wire in order to avoid the large resistive power losses of normal conductors. The two commercially available superconducting wire materials are (1) alloys of niobium-titanium, a ductile material which is used for generating fields up to about 9 T; and (2) a brittle alloy of niobium and tin (Nb3Sn) for fields above 9 T. Practical superconducting wires use complex structures of fine filaments of superconductor that are twisted together and embedded in a copper matrix. The conductors are supported against the electromagnetic forces and cooled by liquid helium at 4.2 K (-452°F). A surrounding thermal insulating enclosure such as a dewar minimizes the heat flow from the surroundings.

Superconducting magnets operating over 20 T have been made with niobium-titanium outer sections and niobium-tin inner sections. Niobium-titanium is used in whole-body nuclear magnetic resonance imaging magnets for medical diagnostics. Other applications of superconducting magnets include their use in nuclear magnetic resonance for chemical analysis, particle accelerators, containment of plasma in fusion reactors, magnetic separation, and magnetic levitation. See Nuclear fusion, Superconducting devices

The highest continuous fields are generated by hybrid magnets. A large-volume (lower-field) superconducting magnet that has no resistive power losses surrounds a water-cooled inner magnet that operates at the highest field. The fields of the two magnets add. Over 35 T has been generated continuously.

Magnet

 

a term applied to all substances in considering their magnetic properties. The diversity of the types of magnets is due to the difference in the magnetic properties of the microparticles that form matter and to the difference in the character of the interaction between them. Magnets are classified according to the magnitude and sign of their magnetic susceptibility x (substances for which ×< 0 are called diamagnetics; for ×> 0, paramagnetics; and for X »1, ferromagnetics). A more thorough physical classification of magnets is based on an examination of the nature of microparticles that have magnetic moments, their interaction in matter, and the influence of external factors on magnets.

What does it mean when you dream about a magnet?

Magnets represent a pulling closer to things that need to be examined or drawn out of the unconscious. They also represent a certain kind of personal power, or personal “magnetism.” They sometimes also represent being inexplicably drawn to something, as if by some mysterious magnetic force.

magnet

[′mag·nət] (electromagnetism) A piece of ferromagnetic or ferrimagnetic material whose domains are sufficiently aligned so that it produces a net magnetic field outside itself and can experience a net torque when placed in an external magnetic field.

Magnet

An object or device that produces a magnetic field. Magnets are essential for the generation of electric power and are used in motors, generators, labor-saving electromechanical devices, information storage, recording, and numerous specialized applications, for example, seals of refrigerator doors. The magnetic fields produced by magnets apply a force at a distance on other magnets, charged particles, electric currents, and magnetic materials. See Generator, Motor

Magnets may be classified as either permanent or excited. Permanent magnets are composed of so-called hard magnetic material, which retains an alignment of the magnetization in the presence of ambient fields. Excited magnets use controllable energizing currents to generate magnetic fields in either electromagnets or air-cored magnets. See Electromagnet

The essential characteristic of permanent-magnet materials is an inherent resistance to change in magnetization over a wide range of field strength. Resistance to change in magnetization in this type of material is due to two factors: (1) the material consists of particles smaller than the size of a domain, a circumstance which prevents the gradual change in magnetization which would otherwise take place through the movement of domain wall boundaries; and (2) the particles exhibit a marked magnetocrystalline anisotropy. During manufacture the particles are aligned in a magnetic field before being sintered or bonded in a soft metal or polyester resin. Compounds of neodymium, iron, and boron are used.

Electromagnets rely on magnetically soft or permeable materials which are well annealed and homogeneous so as to allow easy motion of domain wall boundaries. Ideally the coercive force should be zero, permeability should be high, and the flux density saturation level should be high. Coincidentally the hysteresis energy loss represented by the area of the hysteresis curve is small. This property and high electrical resistance (for the reduction of eddy currents) are required where the magnetic field is to vary rapidly. This is accomplished by laminating the core and using iron alloyed with a few percent silicon that increases the resistivity.

Electromagnets usually have an energizing winding made of copper and a permeable iron core. Applications include relays, motors, generators, magnetic clutches, switches, scanning magnets for electron beams (for example, in television receivers), lifting magnets for handling scrap, and magnetic recording heads. See Cathode-ray tube, Clutch, Electric switch, Relay

Special iron-cored electromagnets designed with highly homogeneous fields are used for special analytical applications in, for example, electron or nuclear magnetic resonance, or as bending magnets for particle accelerators.

Air-cored electromagnets are usually employed above the saturation flux density of iron (about 2 T); at lower fields, iron-cored magnets require much less power because the excitation currents needed then are required only to generate a small field to magnetize the iron. The air-cored magnets are usually in the form of a solenoid with an axial hole allowing access to the high field in the center. The conductor, usually copper or a copper alloy, must be cooled to dissipate the heat generated by resistive losses. In addition, the conductor and supporting structure must be sufficiently strong to support the forces generated in the magnet.

In pulsed magnets, higher fields can be generated by limiting the excitation to short pulses (usually furnished by the energy stored in a capacitor bank) and cooling the magnet between pulses. The highest fields are generally achieved in small volumes. A field of 75 T has been generated for 120 microseconds.

Large-volume or high-field magnets are often fabricated with superconducting wire in order to avoid the large resistive power losses of normal conductors. The two commercially available superconducting wire materials are (1) alloys of niobium-titanium, a ductile material which is used for generating fields up to about 9 T; and (2) a brittle alloy of niobium and tin (Nb3Sn) for fields above 9 T. Practical superconducting wires use complex structures of fine filaments of superconductor that are twisted together and embedded in a copper matrix. The conductors are supported against the electromagnetic forces and cooled by liquid helium at 4.2 K (-452°F). A surrounding thermal insulating enclosure such as a dewar minimizes the heat flow from the surroundings.

Superconducting magnets operating over 20 T have been made with niobium-titanium outer sections and niobium-tin inner sections. Niobium-titanium is used in whole-body nuclear magnetic resonance imaging magnets for medical diagnostics. Other applications of superconducting magnets include their use in nuclear magnetic resonance for chemical analysis, particle accelerators, containment of plasma in fusion reactors, magnetic separation, and magnetic levitation. See Magnetic levitation, Magnetic separation methods, Nuclear fusion, Superconducting devices

The highest continuous fields are generated by hybrid magnets. A large-volume (lower-field) superconducting magnet that has no resistive power losses surrounds a water-cooled inner magnet that operates at the highest field. The fields of the two magnets add. Over 35 T has been generated continuously.

magnet

a body that can attract certain substances, such as iron or steel, as a result of a magnetic field; a piece of ferromagnetic substance

magnet


magnet

 [mag´net] an object having polarity (oppositely charged ends) and capable of attracting iron.

mag·net

(mag'net), 1. A body that has the property of attracting particles of iron, cobalt, nickel, or various other metallic alloys and that, when freely suspended, tends to assume a definite direction between the magnetic poles of the Earth (magnetic polarity). 2. A bar or horseshoe-shaped piece of iron or steel that has been made magnetic by contact with another magnet or, as in an electromagnet, by passage of electric current around a metallic (iron) core. 3. An electromagnet built in a cylindrical configuration to accommodate a patient in its core, for magnetic resonance imaging. [G. magnēs]
An iron-based mass or bar with magnetic polarity

mag·net

(mag'nĕt) 1. A body that has the property of attracting particles of iron, cobalt, nickel, or any of various metallic alloys and that when freely suspended tends to assume a definite direction between the magnetic poles of the earth (magnetic polarity). 2. A bar or horseshoe-shaped piece of iron or steel that has been made magnetic by contact with another magnet or, as in an electromagnet, by passage of electric current around a metallic (iron) core. 3. An electromagnet built in a cylindric configuration to accommodate a patient in its core, for magnetic resonance imaging. [G. magnēs]

Patient discussion about magnet

Q. who much cost the resonance magnetic machine? new or used A. here is a company that you can even get a MRI scanner in a leasing program:
http://www.nationwideimaging.com/index.php

Q. hey guys! has anyone ever tried a chinese magnet to help a diet?? Somwone I know who is a chinse medicine healer, gave me a special magnet you stick to the right thumb of your hand to help evoid snack attacks. Did you ever hear anything about it?? did iot help anyone??A. i tried magnets. not to dieting but magnets to the feet. supposed to help in giving energy while walking (i hike a lot). couldn't say i felt a big difference, but i only tried it for a day- so i don't know...

More discussions about magnet

MAGNET


AcronymDefinition
MAGNET➣Manufacturing Advocacy and Growth Network
MAGNET➣Mid-Michigan Area Group Narcotics Enforcement Team
MAGNET➣Maritime Awareness Global Network (USCG)
MAGNET➣Massachusetts Access to Government Network
MAGNET➣Multi-Agency Geographic Network (UK)

magnet


Related to magnet: magnet therapy
  • noun

Synonyms for magnet

noun (physics) a device that attracts iron and produces a magnetic field

Related Words

  • bar magnet
  • core
  • device
  • electromagnet
  • field magnet
  • magnetic needle
  • paramagnet
  • permanent magnet
  • static magnet
  • magnetic pole
  • pole
  • solenoid
  • natural philosophy
  • physics

noun a characteristic that provides pleasure and attracts

Synonyms

  • attractive feature
  • attractor
  • attracter
  • attraction

Related Words

  • characteristic
  • feature
  • attention
  • tourist attraction
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更新时间：2024/11/14 21:03:01