Definition of copper sulfate
: a sulfate of copper; especially : the normal sulfate that is white in the anhydrous form but blue in the crystalline hydrous form CuSO4·5H2O and that is often used as an algicide and fungicide
First Known Use of copper sulfate
Medical Definition of copper sulfate
: a sulfate of bivalent copper that is best known as the blue crystalline hydrate CuSO4·5H2O, is used as an algicide and fungicide, and has been used medicinally in solution as an emetic but is not now recommended for such use because of its potential toxicity—called also cupric sulfate
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