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magnetite

[mag-ni-tahyt] /ˈmæg nɪˌtaɪt/
noun
1.
a very common black iron oxide mineral, Fe 3 O 4 , that is strongly attracted by magnets: an important iron ore.
Origin
1850-1855
1850-55; magnet + -ite1; compare German Magnetit
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for magnetite

magnetite

/ˈmæɡnɪˌtaɪt/
noun
1.
a black magnetic mineral, found in igneous and metamorphic rocks and as a separate deposit. It is a source of iron. Composition: iron oxide. Formula: Fe3O4. Crystal structure: cubic
Derived Forms
magnetitic (ˌmæɡnɪˈtɪtɪk) adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for magnetite
n.

magnetic iron ore, 1840, from German magnetit; see magnet + -ite (2).

Online Etymology Dictionary, © 2010 Douglas Harper
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magnetite in Science
magnetite
  (māg'nĭ-tīt')   
A brown to black mineral that is strongly magnetic. It crystallizes in the cubic system and commonly occurs as small octahedrons. Magnetite occurs in many different types of rock and is an important source of iron. Chemical formula: Fe3O4.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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