magnetism

[mag-ni-tiz-uhm]

noun

1. the properties of attraction possessed by magnets; the molecular properties common to magnets.

2. the agency producing magnetic phenomena.

3. the science dealing with magnetic phenomena.

4. strong attractive power or charm.

   Everyone succumbed to the magnetism of his smile.

magnetism

/ ˈmæɡnɪˌtɪzəm /

noun

1. the property of attraction displayed by magnets

2. any of a class of phenomena in which a field of force is caused by a moving electric charge See also electromagnetism ferromagnetism diamagnetism paramagnetism

3. the branch of physics concerned with magnetic phenomena

4. powerful attraction

magnetism

1. The properties or effects of magnetic fields.

2. The force produced by a magnetic field.

3. See more at magnetic field

magnetism

1. A fundamental property of some materials (for example, iron) and electrical currents (see also current) by which they are capable of exerting a force on magnets. (See electromagnet, magnet, and magnetic field.)

Other Word Forms

• magnetist noun

Word History and Origins

Origin of magnetism¹

From the New Latin word magnētismus, dating back to 1610–20. See magnet, -ism

A Closer Look

Magnetism is intimately linked with electricity, in that a magnetic field is established whenever electric charges are in motion, as in the flow of electrons in a wire, or the movement of electrons around an atomic nucleus. In atoms, this invisible field consists of closed loops called lines of force that surround and run through the atom. Magnetic regions where lines of force come together densely are called north and south poles. In substances in which the magnetic fields of each atom are aligned, the magnetic field causes the entire substance to act like single magnet—with north and south poles and a surrounding magnetic field. Permanent magnets are made of substances that retain this alignment. If a magnet is cut in two, each piece becomes a separate magnet with two poles. A coil of wire wrapped around an iron core can be made magnetic by running electric current through it; the looping electrons then create a magnetic field in just the same way as the spinning electrons in individual atoms. As long as current flows, the coil remains magnetized. Such magnets, called electromagnets, are used in many devices such as doorbells and switches. The connection between electric and magnetic fields is not one of cause and effect, however. Einstein showed that both the magnetic and electric fields are part of a single electromagnetic field, described by a single mathematical object called a tensor. Observers in different reference frames will not observe the same separate values for electric and magnetic fields, but will observe identical electromagnetic tensors. Whether or not magnetic monopoles (elementary particles carrying an isolated north or south magnetic “charge,” analogous to positive or negative electric charge) actually exist remains unknown; though they are predicted by some theories, none have been detected.

Example Sentences

"In simple terms, it's an interaction between light and magnetism," says Dr. Capua.

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"This kind of radio signal just wouldn't exist unless material had completely left the star's bubble of powerful magnetism," adds Joe.

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I’ve long been struck by her magnetism on stage, her fearless approach to her craft, and the stark beauty of her words on the page, including the National Book Award-winning “Just Kids.”

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When arranged in just the right ways, two-dimensional materials can display unusual and valuable quantum effects such as superconductivity and exotic types of magnetism.

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Scientists have long explained the source of this protective force through the dynamo theory, which describes how motion within Earth's liquid metal core creates magnetism.

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Related Words

• allure 
• charisma