magnetic field

noun

Definition of magnetic field 

: the portion of space near a magnetic body or a current-carrying body in which the magnetic forces due to the body or current can be detected

Examples of magnetic field in a Sentence

Recent Examples on the Web

So the idea is that Mars must have lost its magnetic field at some point. Eva Botkin-kowacki, The Christian Science Monitor, "How NASA's latest mission to Mars might dig up truths about Earth," 7 May 2018 But Mars's internal dynamo died, and its magnetic field dissipated. Sarah Kaplan, Washington Post, "‘Marsquakes’ are a thing, and this NASA spacecraft will go look for them," 3 May 2018 Our planet’s magnetic field generates a protective bubble, called the magnetosphere, that shields the surface from damaging cosmic radiation. National Geographic, "Chernobyl's Mutated Species May Help Protect Astronauts," 30 Apr. 2018 But according to a hypothesis dating back to the 1990s, some of these secondary showers can be bounced out and away from our star by strong fluctuations in its magnetic field. Shannon Hall, Scientific American, "The Sun Is Spitting Out Strange Patterns of Gamma Rays—and No One Knows Why," 28 Mar. 2018 So far, Juno seems to be learning that everything about Jupiter, from its magnetic fields to its fierce winds, is even larger than realized. David Grossman, Popular Mechanics, "Raging Cyclones and Jet Streams on Jupiter Perplex Scientists," 9 Mar. 2018 Increased chances of viewing the northern lights depend on clear weather, location and the earth’s magnetic field. Susan Selasky And Emma Tomsich, Detroit Free Press, "Strawberry moon, Saturn to light up sky tonight," 27 June 2018 The container uses an external magnetic field to align the spin of all the neutrons, and magnets lining the walls of the container gently repel the particles, keeping them from hitting the walls. John Timmer, Ars Technica, "How long can a neutron survive outside an atom?," 14 May 2018 When the charger is plugged in and the compatible battery is placed on it, the charger begins wirelessly transmitting an alternating magnetic field. Timothy Dahl, Popular Mechanics, "Two Big Ways Cordless Power Tools Are About To Get Even Better," 22 Dec. 2015

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'magnetic field.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of magnetic field

1845, in the meaning defined above

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Last Updated

22 Sep 2018

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Time Traveler for magnetic field

The first known use of magnetic field was in 1845

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More Definitions for magnetic field

magnetic field

noun

Kids Definition of magnetic field

: the portion of space near a magnetic object within which magnetic forces can be detected

magnetic field

noun

Medical Definition of magnetic field 

: the portion of space near a magnetic body or a current-carrying body in which the magnetic forces due to the body or current can be detected the magnetic field of the heart

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More from Merriam-Webster on magnetic field

Spanish Central: Translation of magnetic field

Nglish: Translation of magnetic field for Spanish Speakers

Britannica.com: Encyclopedia article about magnetic field

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