gesso

English Thesaurus

1. gypsum or plaster of Paris spread on a surface to make it suitable for painting or gilding (or a surface so prepared) (noun.substance)

hypernym	:	gypsum,
definition	:	a common white or colorless mineral (hydrated calcium sulphate) used to make cements and plasters (especially plaster of Paris) (noun.substance)

hypernym	:	plaster, plaster of paris,
definition	:	any of several gypsum cements; a white powder (a form of calcium sulphate) that forms a paste when mixed with water and hardens into a solid; used in making molds and sculptures and casts for broken limbs (noun.substance)