gypsum gypster • gypsy · · · Info · Definitions · Characters · · gypsum · · Text Latin · · Script 6 · · Length Definitions · · · (noun) a common white or colorless mineral (hydrated calcium sulphate) used to make cements and plasters (especially plaster of Paris). · · Noun Definition 1 Characters · · g latin small letter g U+0067 m latin small letter m U+006D p latin small letter p U+0070 s latin small letter s U+0073 u latin small letter u U+0075 y latin small letter y U+0079