Limonite

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Limonite

(Science: chemical) hydrous sesquixoide of iron, an important ore of iron, occurring in stalactitic, mammillary, or earthy forms, of a dark brown colour, yellowish brown powder. It includes bog iron. Also called brown hematite.

Origin: gr. Any moist grassy place, a meadow: cf. F. Limonite, g. Limonit.