| 单词 | natural magnet |
| 释义 | magnet /magˈnit/noun
ORIGIN: Through OFr or L, from Gr magnētis (lithos) Magnesian (stone), from Magnēsiā, in Lydia or Thessaly magˈnetar noun (for ‘magnetic star’; cf pulsar under pulsate) a dense neutron star with a magnetic field 1014 times stronger than that of the earth magnetic /mag-netˈik/ or magnetˈical adjective
magnetˈically adverb magnetician /-ishˈən/ noun A magnetist magnetˈics singular noun The science of magnetism magˈnetism noun
magˈnetist noun A scientist specializing in magnetism magˈnetite noun Magnetic iron ore (Fe3O4), called lodestone when polar magnetīzˈable or magnetīsˈable adjective magnetīzāˈtion or magnetīsāˈtion noun magˈnetize or magˈnetise transitive verb
magˈnetīzer or magˈnetīser noun magneto /mag-nēˈtō/ noun (pl magnēˈtos) Short form of magneto-electric machine, a small generator with a permanent magnet, used for ignition in an internal-combustion engine, etc magˈneton noun A natural unit of magnetic moment magˈnetron noun A two-electrode valve in which the flow of electrons from a large central cathode to a cylindrical anode is controlled by crossed electric and magnetic fields, used to give high-powered microwave radiation magnon /magˈnon/ noun A quantum of spin wave energy in magnetic material magnet (high) school noun In the USA, a school that, in addition to providing a general education, specializes in teaching a particular subject such as science, languages or performing arts magnetic battery noun Several magnets placed with their like poles together, so as to act with great force magnetic board noun A white enamelled metal board upon which material for display is mounted by means of magnetic strips magnetic bottle noun The containment of a plasma during thermonuclear experiments by applying a specific pattern of magnetic fields magnetic bubble memory or magnetic bubble store noun (computing) Same as bubble memory (see under bubble) magnetic card noun A piece of plastic or cardboard with a magnetizable surface on which data can be stored magnetic chuck noun A chuck having a surface in which alternate steel elements, separated by insulating material, are polarized by electromagnets, allowing light flat work to be held securely magnetic confinement noun (nuclear eng) In fusion research, the use of shaped magnetic fields to confine a plasma magnetic curves plural noun The curves formed by iron-filings around the poles of a magnet magnetic dip or magnetic inclination noun The angle between the horizontal and the line of the earth's magnetic field magnetic disk or magnetic disc noun (computing) A flat, circular sheet of material coated with a magnetic oxide, used to store programs and data magnetic diskette noun (computing) Same as floppy disk (see under flop1) magnetic drum noun A storage device used in early computers, consisting of a rotating cylinder with a magnetic coating magnetic equator noun The line round the earth where the magnetic needle remains horizontal magnetic field noun The space over which magnetic force is felt magnetic fluid noun A hypothetical fluid formerly assumed to explain the phenomena of magnetism magnetic flux noun The surface integral of the product of the permeability of the medium and the magnetic field intensity perpendicular to the surface magnetic flux density noun The product of the field intensity and the permeability of the medium magnetic forming noun Use of magnetic fields to shape metal magnetic induction noun
magnetic ink noun Ink with magnetic quality, used eg in printing cheques that are to be sorted by machine magnetic ink character recognition noun The reading by a computer of numbers printed in magnetic ink (abbrev MICR) magnetic lens noun The counterpart of an optical lens, in which a magnet or system of magnets is used to produce a field which acts on a beam of electrons in a similar way to a glass lens on light rays magnetic levitation noun Suspension of eg a train above a track by means of a magnetic field magnetic media noun A collective term for all forms of magnetic recording media, such as magnetic disks, tape, etc magnetic meridian noun The vertical plane through the magnetic needle magnetic mine noun A mine sunk to the sea-bottom, detonated by a pivoted magnetic needle when a ship approaches magnetic mirror noun (nuclear eng) A device based on the principle, used in mirror machines, that ions moving in a magnetic field towards a region of considerably higher magnetic field strength are reflected magnetic moment noun A measure of the magnetic strength of a permanent magnet, a current-carrying coil, a moving charge or individual atom in a magnetic field magnetic monopole see monopole magnetic needle noun The light bar in the mariner's compass which, because it is magnetized, always points to the north magnetic north noun The direction indicated by the magnetic needle magnetic poles plural noun Two nearly opposite points on the earth's surface, where the dip of the needle is 90º magnetic resonance imaging noun A medical imaging technique using the magnetic resonances of protons in the body tissue (abbrev MRI) magnetic storm noun A disturbance in the magnetism of the earth magnetic stripe noun (also magˈ-stripe) a horizontal stripe on the back of a credit card, etc, which is read electronically to identify the card magnetic tape noun Flexible plastic tape, coated on one side with magnetic material, used to register for later reproduction television images, or sound, or computer data magnetic therapy noun A therapeutic treatment using the properties of magnetic fields, eg to increase the permeability of cell walls and to accelerate the healing of fractures magnetic variation noun The angular difference between true north and magnetic north at a particular location animal magnetism
artificial magnet A magnet made by rubbing with other magnets bar magnet A magnet in the form of a bar horse-shoe magnet A magnet bent like a horseshoe permanent magnet A magnet that keeps its magnetism after the force which magnetized it has been removed personal magnetism The power of a personality to make itself felt and to exercise influence terrestrial magnetism The magnetic properties possessed by the earth as a whole |
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