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.

Origin:
1610–20; < Neo-Latin magnētismus. See magnet, -ism

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World English Dictionary
magnetism (ˈmæɡnɪˌtɪzəm)
 
n
1.  the property of attraction displayed by magnets
2.  electromagnetism ferromagnetism diamagnetism See also paramagnetism any of a class of phenomena in which a field of force is caused by a moving electric charge
3.  the branch of physics concerned with magnetic phenomena
4.  powerful attraction
 
'magnetist
 
n

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Etymonline
Word Origin & History

magnetism
1610s, from Mod.L. magnetismus (see magnet + -ism). Figurative sense of "personal charm" is from 1650s; in the hypnotic sense it is from Mesmer (see mesmerize). Meaning "science of magnetics" is recorded from early 19c.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
magnetism   (māg'nĭ-tĭz'əm)  Pronunciation Key 
  1. The properties or effects of magnetic fields.

  2. The force produced by a magnetic field. See more at magnetic field.


Our Living Language  : 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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

magnetism definition


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

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
He initially found her beautiful but now the magnetism of her prolonged eye contact has amplified her attractiveness.
As a result, scientists believe they promise a new generation of technologies
  of electricity and magnetism.
Sunspots are caused by irruptions into its surface of the sun's deeper
  magnetism.
Metal objects within the magnetic field do not have to touch a magnet to be
  pulled by magnetism.
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