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sid·er·ite | \ ˈsi-də-ˌrīt 
\
\Definition of siderite
(Entry 1 of 2)
: a native ferrous carbonate FeCO3 that is a valuable iron ore
siderite
noun (2)Definition of siderite (Entry 2 of 2)
: a nickel-iron meteorite
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The first known use of siderite was in 1850
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