blue vitriol

noun

Definition of blue vitriol

: a hydrated copper sulfate CuSO4·5H2O

First Known Use of blue vitriol

1560, in the meaning defined above

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The first known use of blue vitriol was in 1560

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Cite this Entry

“Blue vitriol.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/blue%20vitriol. Accessed 21 Oct. 2020.

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