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Definition of: siderite
(sid′ə·rīt) noun
1. A vitreous, native ferrous carbonate, FeCO3; spathic iron ore: also called chalybite.
2. An indigo–blue variety of quartz.
3. An iron meteorite. [<L siderites <Gk. sidēritēs of iron <sidēros iron]
—sid′er·it′ic (-rit′ik) adjective
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