magnetic field

noun

: 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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Previous studies relied on paleomagnetism, the study of residual magnetic traces in ancient rocks, since the orientation of those magnetic traces would have varied depending upon where that rock was located relative to Earth's magnetic field. — Keith Cooper, Space.com, 13 Oct. 2026 The super-Earth’s bigger iron core would erect a stronger magnetic field around it, better blocking cosmic radiation. — Natalie Wolchover, New York Times, 13 Oct. 2026 Turning trash into research The 12 capsules, designed by University of Kentucky students, contain sensors to measure temperature, pressure, movement, magnetic fields and light during atmospheric re-entry. — Neetika Walter, Interesting Engineering, 9 Oct. 2026 In general, the more coherently these particles move as a group, the stronger the magnetic field is. — Phil Plait, Scientific American, 9 Oct. 2026 See All Example Sentences for magnetic field

Word History

First Known Use

1845, in the meaning defined above

Time Traveler
The first known use of magnetic field was in 1845

Rhymes for magnetic field

See All Rhymes for magnetic field

Browse Nearby Words

magnetic equator
magnetic field
magnetic fluid
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Cite this Entry

“Magnetic field.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/magnetic%20field. Accessed 20 Oct. 2026.

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Kids Definition

magnetic field

noun
: the portion of space near a magnetic body or a body carrying an electric current within which magnetic forces due to the body or current can be detected

Medical Definition

magnetic field

noun
: 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

More from Merriam-Webster on magnetic field

Britannica.com: Encyclopedia article about magnetic field

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