ferrous sulfate

noun Chemistry, Pharmacology.
a bluish-green, crystalline, saline-tasting, water-soluble heptahydrated solid, FeSO 4 ⋅7H 2 O, used chiefly in the manufacture of other iron salts, in water purification, fertilizer, inks, pigments, tanning, photography, and in medicine in the treatment of anemia.
Also called copperas, green vitriol, iron vitriol, iron sulfate.


Origin:
1860–65

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American Heritage
Science Dictionary
ferrous sulfate  
A bluish-green crystalline compound that is used in sewage and water treatment, and as a pigment and fertilizer. It is also used in medicine to treat iron deficiency. Also called green vitriol. Chemical formula: FeSO4·7H2O.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
With the greenish, crystalline look of a pulverized windshield, ferrous sulfate is commonly given to iron-deficient humans.
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