mattressmat‧tress /ˈmætrɪs/ ●●○ noun [countable] 
the soft part of a bed that you lie on [Origin: 1200–1300 Old French materas, from Arabic matrah “place where something is thrown”]
the soft part of a bed that you lie on [Origin: 1200–1300 Old French materas, from Arabic matrah “place where something is thrown”]
