siderotil

noun
sid·er·o·til | \ ˈsidərəˌtil \
plural -s

Definition of siderotil 

: a mineral FeSO4.5H2O consisting of hydrous ferrous sulfate

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History and Etymology for siderotil

German siderotyl, from sider- + -tyl (irregular from Greek tilos anything plucked, fiber, from tillein to pluck)

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