magnetic field


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 Newsletter Sign-up Princeton and many other advanced labs are trying to fuse hydrogen isotopes by enveloping them in an intense magnetic field that traps and squeezes the atoms, heating them to temperatures 10 times the sun’s core. Daniel Michaels, WSJ, "Fusion Startups Step In to Realize Decades-Old Clean Power Dream," 6 Feb. 2020 Slated for launch in early February, the European Space Agency’s Solar Orbiter will tag team with NASA’s Parker Solar Probe to study the enigmatic solar winds and magnetic field of our nearest star. Charlie Wood, Popular Science, "This new solar orbiter will peek at some of the sun’s most secretive spots," 28 Jan. 2020 Live Science says Earth’s magnetic field is still on the move, according to the latest report in a series that comes out every five years. Caroline Delbert, Popular Mechanics, "Magnetic North Pole Changes Time Zones, Just Keeps Drifting," 17 Dec. 2019 The measurements revealed that quick reversals in magnetic fields and fast-moving jets of plasma cause turbulence in the solar wind. Jason Daley, Smithsonian, "NASA’s Sun-Orbiting Probe Reveals New Secrets of Our Host Star," 6 Dec. 2019 One concept plays with the idea of ditching coolants and using rare earth materials and magnetic fields to generate heat and cold air. Chase Purdy, Quartz, "India is the epicenter of rethinking air conditioning," 26 July 2019 Other payloads, several built by students, will study how Earth's magnetic field and charged particles in the near-space environment affect sensitive electronics and communications. William Harwood, CBS News, "SpaceX Falcon Heavy poised for dramatic night launch," 24 June 2019 Earth's magnetic field protects the ISS from much of the radiation of space. Anchorage Daily News, "What the Space Age taught us: Earth is the best of all possible worlds," 23 June 2019 Current technology at reactors around the world use superconductors to create a magnetic field. Kyle Mizokami, Popular Mechanics, "At Last, the Guy Behind the Navy's Wild UFO Patents Speaks," 24 Jan. 2020

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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Time Traveler for magnetic field

Time Traveler

The first known use of magnetic field was in 1845

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Statistics for magnetic field

Last Updated

24 Feb 2020

Cite this Entry

“Magnetic field.” Dictionary, Merriam-Webster, Accessed 28 Feb. 2020.

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More Definitions for magnetic field

magnetic field


Kids Definition of magnetic field

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

magnetic field


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 Encyclopedia article about magnetic field

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