plas·ter of Par·is
noun/ˌplɑːstər əv ˈpærɪs/
/ˌplæstər əv ˈpærɪs/
(also more frequent plaster)
[uncountable]- a white powder that is mixed with water and becomes very hard when it dries, used especially for making copies of statues or holding broken bones in place
建筑石膏；熟石膏