copperas

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cop·per·as

(kop'er-as),
The impure commercial variety of ferrous sulfate.

copperas

(kŏp′ər-əs)
n.
A green, crystalline heptahydrate mineral of ferrous sulfate, FeSO4·7H2O. Also called green vitriol.

copperas

(kop'e-ras) [L. (aqua) cuprosa, coppery (water)]
An impure form of ferrous sulfate formerly used as a disinfectant, deodorizer, and a treatment for iron deficiency.
See: ferrous sulfate
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