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

Plaster is a building material, usually made from lime, gypsum, or cement that is mixed with water and applied to surfaces to create a smooth, slightly textured yet durable surface. —Lauren Bengtson, Better Homes & Gardens, 15 May 2025

The United States imports 85% of its softwood lumber from Canada and 70% of its gypsum, which is used in drywall, from Mexico. —Nick Rosenberger, Idaho Statesman, 21 Apr. 2025

An extended trade war would prove costly for specific sectors, including U.S. automakers (who rely on supply chains that crisscross North American borders), homebuilders (who use Canadian lumber and gypsum) and agriculture (fertilizer). —Neil Irwin, Axios, 3 Feb. 2025

Plaster of Paris, gypsum, and other white, powdery fillers made their way into milk and flour for color and texture. —Lauren Leffer, Popular Science, 1 May 2025

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