The adjective ferruginous may mean:
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Containing iron, applied to water, oil, and other non-metals
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Having rust on the surface
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With the rust (color)
See also
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Ferrous, containing iron (for metals and alloys) or iron(II) cations
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Ferric, containing iron(III) cations
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Ferrate, anions containing iron
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Ferruginous body, a nodule indicative of asbestos inhalation
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Ferruginea (disambiguation)
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List of birds described as ferruginous
