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see magnetitemagnetite
, lustrous black, magnetic mineral, Fe3O4. It occurs in crystals of the cubic system, in masses, and as a loose sand. It is one of the important ores of iron (magnetic iron ore) and is a common constituent of igneous and metamorphic rocks.
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McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


, loadstone
a. a rock that consists of pure or nearly pure magnetite and thus is naturally magnetic
b. a piece of such rock, which can be used as a magnet and which was formerly used as a primitive compass
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
As Plume explains, then, the "main part" of recruiting entails seducing women: "the Women, you know, are the Loadstones everywhere--gain the Wives, and you're caress'd by the Husbands; please the Mistresses, and you are valu'd by their Gallants .
To engage in ethical leadership is not to tap into a loadstone a pre-existing mass of ready-made answers.
Instances where the lightning has actually struck the vessel, so as to smite down some of the spars and rigging, the effect upon the needle has at times been still more fatal; all its loadstone virtue being annihilated, so that the before magnetic steel was of no more use than an old wife's knitting needle.
Established in 2006, the Masdar Initiative is the loadstone of this strategy.
The imagination gives out what it has first absorbed by congeniality of temperament, what it has attracted and moulded into itself by elective affinity, as the loadstone draws and impregnates iron.
Monty Lilburn, 33, created the mapping software Loadstone, which uses GPS co-ordinates of bus stops, cashpoints and train stations.
We found nine available electronic mobility aids, aimed at navigation, that people who are visually impaired can use individually, which means that no environmental adaptations are needed: Blind Navigator (Bestpluton, n.d.a), BrailleNote GPS and VoiceNote GPS (Abledata, 2008; Greenberg & Kuns, 2008; HumanWare, n.d.a; Sendero Group, n.d.a), Geotact (Farcy et al., 2006), GPS Petit-Poucet GRAND RAID (Bestpluton, n.d.a), Loadstone GPS (Loadstone GPS Team, n.d.a, n.d.b), PAC Mate + Street Talk (Freedom Scientific, 2005, n.d.), Trekker (HumanWare, n.d.b), Wayfinder Access (Wayfinder, n.d.a, n.d.b), and Way To Go (Sendero Group, n.d.b, n.d.c).
Although sixteenth-century humanists also tended to view direct appeals to the passions with suspicion, most notably in juridical or political spheres, theater was regarded as the privileged domain for pathetic discourse and paroxysmal effusions became the loadstone of the tragic art.
More than 1,000 years earlier the Chinese had already discovered that if loadstone was placed in a container of water, magnetic force would cause the stone to drift to one side, acting as a compass.
(751) A few lines later we are "near the solemn river, stealing away by night, as all things steal away, by night and by day, so quietly yielding to the attraction of the loadstone rock of Eternity ..." (751).
The depth of British education carries with it the loadstone of monodirectional viewpoints, sharply focused upon excellence within a singularly narrow frame.
Fleury Mottelay (On the Loadstone, 1893), reprinted in Great Books of the Western World, vol 28: Gilbert, Galileo, Harvey (Chicago: Great Books, 1952).