gypsum

noun

gyp·​sum ˈjip-səm 

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

The lawsuit alleged that state officials and developers knew the subdivision was built over a former gypsum mine. — ABC News, 6 Oct. 2026

The park is renowned for its wave-like dunes made of stark-white gypsum sand. — Evie Carrick, Travel + Leisure, 1 July 2026

Embedded in hardened gypsum soil, the footprints were surrounded by ancient grass seeds radiocarbon dated to between 21,130 and 22,860 years ago. — Joe Yogerst, CNN Money, 27 June 2026

Zidack says lime, dolomitic lime, gypsum, and bone meal are all suitable alternative sources. — Gemma Johnstone, The Spruce, 25 May 2026

Word History

Etymology

Latin, from Greek gypsos

First Known Use

14th century, in the meaning defined at sense 1

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