Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The mineral form of black iron oxide, Fe3O4, that often occurs with magnesium, zinc, and manganese and is an important ore of iron.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A magnetic mineral, Fe3O4, one of the primary ores of iron. It has also been called lodestone.

from the GNU version of the Collaborative International Dictionary of English

  • n. An oxide of iron (Fe3O4) occurring in isometric crystals, also massive, of a black color and metallic luster. It is readily attracted by a magnet and sometimes possesses polarity, being then called loadstone. It is an important iron ore. Called also magnetic iron.

from The Century Dictionary and Cyclopedia

  • n. Magnetic oxid of iron; a black oxid of iron (Fe3O4 or FeO.Fe2O3) which is strongly attractable by a magnet.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. an oxide of iron that is strongly attracted by magnets

Etymologies

Sorry, no etymologies found.

Examples

  • These mineral crystals were identified as magnetite, pyrrhotite, and greigite.

    The Case for Mars

  • In 1948, Néel made another fundamental discovery with his explanation of the strong magnetism found in the ferrite materials, of which magnetite is one.

    Nobel Prize in Physics 1970 - Presentation Speech

  • Like PAHs, these minerals -- mainly iron compounds called magnetite and pyrrhotite -- can come from inorganic sources.

    Come In, Mars

  • Spoornet spokesman Molatwane Likhethe said these two mines produced a waste product called magnetite, containing about 55 percent iron ore.

    ANC Daily News Briefing

  • It is, of course, a self-evident fact that the magnetic iron ore, which is a form of peroxide, commonly known as magnetite, or lodestone, has the power of attracting a magnet when swinging free, or of being attracted by a magnet, to account for which many plausible reasons have been advanced.

    The Chemistry, Properties and Tests of Precious Stones

  • The copper at Hillside has a close association with the mineral magnetite, which is the cause of the magnetic anomaly.

    Latest News - Yahoo!7 News

  • Further resource drilling for the eastern extension is planned, where previous drilling undertaken has shown that the quality of the magnetite is the same as that in the western portion of the deposit.

    WA Business News - Latest News

  • Very seldom is the obsidian colorless; most often it's very dark or black due to impurities such as magnetite and hematite, both being iron oxide variations.

    The Last of the Obsidian Artifacts in Puerto Vallarta

  • Certain minerals, such as magnetite, ilmenite, spinel, corundum, etc., are often found as primary segregations within the mass of igneous rock.

    The Economic Aspect of Geology

  • Previous research demonstrated that arsenic can be removed from water using activated carbon or iron minerals, such as magnetite nanocrystals.

    SciDev.Net

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