calcium sulfate

noun

: a white salt CaSO4 that occurs especially as anhydrite, gypsum, and plaster of paris and that in hydrated form is used as a building material and in anhydrous form is used as a drying agent

Examples of calcium sulfate in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Look for firm tofu that’s made with calcium sulfate. Kelly Burch, Verywell Health, 17 June 2026 Some tofu is made with calcium salts, such as calcium sulfate, which help firm it and boost its calcium content. Jillian Kubala, Health, 17 Apr. 2026 Samples of the film were then immersed in a supersaturated calcium sulfate solution for 20 hours at room temperature, to allow the mineral scale to deposit. Abhimanyu Ghoshal, New Atlas, 27 Nov. 2025 White veins of calcium sulfate present clear evidence that water — crucial for life — once ran through the rock. Ashley Strickland, CNN Money, 10 Sep. 2025

Word History

First Known Use

1868, in the meaning defined above

Time Traveler
The first known use of calcium sulfate was in 1868

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Cite this Entry

“Calcium sulfate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/calcium%20sulfate. Accessed 5 Jul. 2026.

Kids Definition

calcium sulfate

noun
: a white odorless compound of calcium that is used especially in building materials and to dry other substances

Medical Definition

calcium sulfate

noun
: a white calcium salt CaSO4 used especially as a diluent in tablets and in hydrated form as plaster of paris

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