blue vitriol


: a hydrated copper sulfate CuSO4·5H2O

Word History

First Known Use

1560, in the meaning defined above

Time Traveler
The first known use of blue vitriol was in 1560

Dictionary Entries Near blue vitriol

Cite this Entry

“Blue vitriol.” Dictionary, Merriam-Webster, Accessed 20 May. 2024.

Kids Definition

blue vitriol

: a compound of copper sulfate chemically combined with water
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