Definition
| • | Carbonate of iron, an important ore of iron occuring generally in cleavable masses, but also in rhombohedral crystals. It is of a light yellowish brown color. Called also sparry iron, spathic iron. |
| • | A meteorite consisting solely of metallic iron. |
| • | An indigo-blue variety of quartz. |
| • | Formerly, magnetic iron ore, or loadstone. |
| • | Any plant of the genus Sideritis; ironwort. |
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