magnetite

noun
mag·​ne·​tite | \ ˈmag-nə-ˌtīt How to pronounce magnetite (audio) \

Definition of magnetite

: a black isometric mineral of the spinel group that is an oxide of iron and an important iron ore

Examples of magnetite in a Sentence

Recent Examples on the Web Without it, Geobacter could no longer change rust into magnetite. Sophie Bushwick, Scientific American, "Electricity-Carrying Bacteria Lead to New Applications—and New Questions," 23 Nov. 2020 One involves a mineral called magnetite, whose crystals act as small, rotating magnets. Ed Yong, The Atlantic, "The Strange Influence the Sun Has on Whales," 24 Feb. 2020 To find out, Martin’s and Moran’s teams joined forces to investigate three iron-rich minerals found near vents: greigite, magnetite, and awaruite. Robert F. Service, Science | AAAS, "Was this life’s first meal?," 2 Mar. 2020 Early iron compass needles were magnetized by lodestone, or magnetized magnetite minerals, pulled from the Earth. Jennifer Leman, Popular Mechanics, "How Do Magnets Work?," 7 Dec. 2019 And that includes the, sort of the magnetite sediment that is being dumped into the lake. National Geographic, "Episode 6: The Aquarius Project," 19 Nov. 2019 Specifically, the multi-heavy mineral prospect consists of abrasives garne and epidote, and zircon, magnetite and gold. Elwood Brehmer, Anchorage Daily News, "Unique state-owned prospect a highlight as spending on Alaska mineral exploration rebounds," 7 Nov. 2019 That thick black sand is magnetite, an iron ore eroded from the sandstone cliff walls. Tom Stienstra, SFChronicle.com, "Sunday getaway to San Francisco’s Fort Funston," 23 Nov. 2019 In one experiment, when Geobacter was prevented from making pili, the bacteria couldn’t turn rust to magnetite. New York Times, "Wired Bacteria Form Nature’s Power Grid: ‘We Have an Electric Planet’," 1 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'magnetite.' 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 magnetite

1851, in the meaning defined above

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Time Traveler for magnetite

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The first known use of magnetite was in 1851

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Cite this Entry

“Magnetite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/magnetite. Accessed 7 Mar. 2021.

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More from Merriam-Webster on magnetite

Britannica.com: Encyclopedia article about magnetite

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