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1
: a widely distributed mineral consisting of hydrous calcium sulfate that is used especially as a soil amendment and in making plaster of paris
2
: drywall
Examples of gypsum in a Sentence
Recent Examples on the Web
Some 70% of sawmill and wood product imports, which are already subject to tariffs, come from Canada, and 71% of lime and gypsum products come from Mexico.
—
Lew Sichelman, Miami Herald, 11 Feb. 2025
According to the association, about 70% of softwood lumber (for framing) and gypsum (for drywall) used to construct single- and multi-family homes in the U.S. are imported from Canada and Mexico, respectively.
—
Jessica Boehm, Axios, 5 Feb. 2025
And 71% of lime and gypsum product imports are from Mexico, totaling $352 million.
—
Diana Olick, CNBC, 3 Feb. 2025
Pipe decay Sinkholes are most common in areas underlain by rocks like gypsum, limestone and other carbonate rocks, which can be naturally dissolved by groundwater, according to the United States Geological Survey (USGS).
—
Yumi Asada, Chris Lau and Minori Konishi, CNN, 31 Jan. 2025
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Word History
Etymology
Latin, from Greek gypsos
First Known Use
14th century, in the meaning defined at sense 1
Time Traveler
The first known use of gypsum was
in the 14th century
Dictionary Entries Near gypsum
Cite this Entry
“Gypsum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/gypsum. Accessed 21 Feb. 2025.
Kids Definition
gypsum
noun
gyp·sum
ˈjip-səm
: a colorless mineral that consists of calcium sulfate occurring in crystals or masses and that is used especially as a soil improver and in making plaster of paris
Medical Definition
gypsum
noun
gyp·sum
ˈjip-səm
: a widely distributed mineral CaSO4·2H2O consisting of hydrous calcium sulfate that is used especially as a soil amendment and in making plaster of paris
More from Merriam-Webster on gypsum
Nglish: Translation of gypsum for Spanish Speakers
Britannica.com: Encyclopedia article about gypsum
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