a very soft, monoclinic mineral, CaSO2HO, commonly found with other evaporites in sedimentary rock and used to make plaster of Paris and cement; hydrous calcium sulfate
Origin of gypsumMiddle English from Classical Latin from Classical Greek gypsos, chalk, gypsum from Semitic
A widespread colorless, white, or yellowish mineral, CaSO4 · 2H2O, used in the manufacture of plaster of Paris, various plaster products, and fertilizers.
Origin of gypsumMiddle English gipsum from Latin gypsum from Greek gupsos probably of Semitic origin Arabic jibs, ji&slowdot;&slowdot;, ja&slowdot;&slowdot; from Akkadian ga&slowdot;&slowdot;u
From Latin gypsum, from Ancient Greek γύψος (gupsos).