base material

base ma·te·ri·al

any substance from which a denture base may be made (for example, shellac, acrylic resin, vulcanite, polystyrene, metal).

base ma·te·ri·al

(bās mă-tērē-ăl) Substance from which a denture base may be made (e.g., shellac, acrylic resin, vulcanite, polystyrene, metal).