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copper sulfate
noun
: 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
Examples of copper sulfate in a Sentence
Recent Examples on the Web
Avène’s proprietary mineral water has been studied extensively and is proven to have anti-inflammatory and redness-relieving properties; the formula also features fellow skin soothers zinc oxide, zinc sulfate, and copper sulfate to help heal skin.
—Emily Orofino, Allure, 24 Oct. 2024
Starting in the late 1800s people discovered that chemicals, such as copper sulfate, could prevent a pest from causing crop damage.
—Steven Savage, Forbes, 22 Oct. 2024
The Environmental Protection Agency also authorized adding additional copper sulfate and sodium permanganate to the aqueduct's reservoirs to combat the algae, the Army Corps of Engineers said.
—Faris Tanyos, CBS News, 3 July 2024
Organic farmers had to regularly and preemptively spray with copper sulfate, though biodynamic Château Fonplégade reports good results with an oak bark solution.
—Elin McCoy, Fortune Europe, 11 May 2024
Silverwood Lake was treated with copper sulfate on Tuesday in an effort to control the algal bloom, agency officials said.
—Hayley Smith, Los Angeles Times, 9 May 2024
Fungicides for bacterial leaf spot must be copper-based, or have copper in them (mancozeb, copper octanoate, copper sulfate, copper hydroxide).
—Tim Johnson, Chicago Tribune, 19 Aug. 2023
Spray with copper sulfate during early spring each year to help prevent the problem before the buds begin to break.
—oregonlive, 19 Aug. 2023
But the microbes don’t just clean the copper sulfate up.
—Joshua Learn, Discover Magazine, 5 May 2021
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'copper sulfate.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Word History
First Known Use
1869, in the meaning defined above
Dictionary Entries Near copper sulfate
Cite this Entry
“Copper sulfate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/copper%20sulfate. Accessed 5 Nov. 2024.
Kids Definition
copper sulfate
noun
: a usually blue crystalline compound that is used to destroy algae and fungi
Medical Definition
copper sulfate
noun
: 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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