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
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In plain terms, these sensors may help map weak magnetic fields near steel, cables or electrical conductors. Alex Krasnok, Scientific American, 25 June 2026 Earth’s upper atmosphere releases oxygen ions into space, adding mass to the magnetic field. Jamie Carter, Forbes.com, 5 July 2026 On Earth, our planet’s atmosphere and magnetic field protect us from these fast-moving particles. Tom Hawking, Popular Science, 25 June 2026 The method lets scientists detect extremely weak electric and magnetic fields that can interfere with fragile quantum states. Aamir Khollam, Interesting Engineering, 3 July 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

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Cite this Entry

“Magnetic field.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/magnetic%20field. Accessed 10 Jul. 2026.

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

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