GYPSUM

gypsum

(noun) a common white or colorless mineral (hydrated calcium sulphate) used to make cements and plasters (especially plaster of Paris)

Source: WordNet® 3.1

Etymology

Noun

gypsum (countable and uncountable, plural gypsums)

A mineral consisting of hydrated calcium sulphate. When calcined, it forms plaster of Paris.

Source: Wiktionary

Gyp"sum, n. Etym: [L. gypsum, Gr. jibs plaster, mortar, Per. jabs lime.] (Min.)

Definition: A mineral consisting of the hydrous sulphate of lime (calcium). When calcined, it forms plaster of Paris. Selenite is a transparent, crystalline variety; alabaster, a fine, white, massive variety.

Source: Webster’s Unabridged Dictionary 1913 Edition

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