Magnet definitions

măg'nĭt
The definition of a magnet is a person or thing that attracts, or a piece of iron that can attract other iron.
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Magnets work because of the movement of electrons that produce a tiny magnetic field. Electrons can act like particles or waves, and they have a charge and mass.
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A magnet produces a magnetic field which attracts metals such as iron, cobalt, and nickel. In this magnetic field, the lines of force exit through the north pole and enter through the south pole, so that explains why opposite poles attract.
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A magnet can have more than one north or south pole, but they always occur in pairs, so if it had two north poles, it would also have two south poles.
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The strongest natural magnet is lodestone.
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Computers use magnets to store data.
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Magnets are important parts of televisions, compasses, speedometers, generators, transformers, electric motors, and burglar alarms.
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Trains use magnetic propulsion to travel fast.
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The Earth uses its magnetic field to protect it from the solar wind.
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Medical uses include MRIs (Magnetic Resonance Imaging) and electromagnetic fields that can help bones heal as well as helping to prevent bone and muscle loss in zero gravity environments.
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Magnet therapy involves placing magnets on parts of the body to alleviate pain. It is said that this works because more blood is attracted to the area (the iron in the blood), which speeds healing, and the magnets affect nearby cells.

An example of a magnet is a light that attracts moths at night.

An example of a magnet is a set of plastic letters with iron backs that cling to the side of a refrigerator.

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An object that is surrounded by a magnetic field and that has the property, either natural or induced, of attracting iron or steel.
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An electromagnet.
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A person, a place, an object, or a situation that exerts attraction.

A village that is a magnet for tourists.

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Any piece of certain, esp. ferromagnetic, material, as iron, that produces a magnetic field, thereby attracting ferromagnetic materials and attracting or repelling other magnets: this property may be permanent or temporarily induced.
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A person or thing that attracts or collects as if by magnetism.
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A material or object that produces a magnetic field. Lodestones are natural magnets, though many materials, especially metals, can be made into magnets by exposing them to a magnetic field.
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Origin of magnet

Middle English from 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