lode·stone /-ˌston/
  天然磁石,吸引人的東西
  Load·stone, Lode·stone, n.  Min. A piece of magnetite, a magnetic iron ore, possessing polarity like a magnetic needle, having the power to attract as well as to be attracted magnetically. See Magnetite.
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  Lode·stone n. Min. Same as Loadstone.
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  lodestone
       n : a permanent magnet consisting of magnetite that possess
           polarity and has the power to attract as well as to be
           attracted magnetically [syn: loadstone]