grand feu
/ɡrand ˈfjuː/noun
High temperature required for the firing of ceramics; the technique of firing ceramics at a high temperature.
adjective
Of or relating to the firing of ceramics at high temperature; specifically designating porcelain or a ceramic colour or glaze fired at high temperature.
Origin
Mid 19th century. From French grand feu, lit. great fire from grand + feu fire.