plasterboard
noun [ U ] mainly UK uk/ˈplɑː.stə.bɔːd/ us/ˈplæs.tɚ.bɔːrd/ (US usually drywall, wallboard)
石膏灰泥板
material consisting of two sheets of heavy paper with a layer of plaster between them, used to make walls and ceilings before putting on a top layer of plaster