tes·​la ˈte-slə How to pronounce tesla (audio)
: a unit of magnetic flux density in the meter-kilogram-second system equivalent to one weber per square meter

Example Sentences

Recent Examples on the Web The permanent magnets generate only 0.055 tesla, so no magnetic shielding is needed (standard MRI scanners use 1.5- or 3-tesla fields). Simon Makin, Scientific American, 16 Dec. 2021 The plan was to run a current through it, resulting in a magnetic field of twenty tesla. Rivka Galchen, The New Yorker, 4 Oct. 2021 Described in a letter to the journal Nature, the magnet reaches the strength of 45.5 teslas. David Grossman, Popular Mechanics, 19 June 2019 The field measured out to 1,200 teslas, a unit of magnetic measurement. David Grossman, Popular Mechanics, 27 Sep. 2018 The team doesn’t intend to stop at 32 teslas, however. Kyree Leary, NBC News, 20 Dec. 2017 The National MagLab has the world’s strongest hybrid magnet which reaches 45 tesla. Gary Fineout, The Seattle Times, 22 Aug. 2017 Here are some other happenings this weekend: ALL WEEKEND ‘TESLA: Staff Report, Orange County Register, 25 May 2017 Tesla records also show that 75 percent of the ambulance trips were unrelated to work injuries, for example, an illness or another pre-existing condition. Louis Hansen, The Mercury News, 18 May 2017 See More

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

Word History


Nikola Tesla

First Known Use

1958, in the meaning defined above

Time Traveler
The first known use of tesla was in 1958

Dictionary Entries Near tesla

Cite this Entry

“Tesla.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tesla. Accessed 9 Dec. 2022.

Medical Definition


tes·​la ˈtes-lə How to pronounce tesla (audio)
: a unit of magnetic flux density in the mks system equivalent to one weber per square meter

Biographical Definition


biographical name

Tes·​la ˈte-slə How to pronounce Tesla (audio)
Nikola 1856–1943 American (Croatian-born) electrical engineer and inventor

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