gesso
/ˈdʒesəʊ/noun
(pl. -oes)［mass noun］
- a hard compound of plaster of Paris or whiting in glue, used in sculpture or as a base for gilding or painting on wood（作雕塑时用的）白垩底料; （涂金或画木版画时用的）石膏底粉。
词源
late 16th cent.: Italian, from Latin gypsum （see GYPSUM）.