prototype
noun [ C ]
uk/ˈprəʊtəʊtaɪp/ us PRODUCTION
the first example of a machine or other industrial product, from which all later forms are developed:
build/develop/create a prototype Manufacturers have built a prototype which will be shown at the forthcoming trade fair.
early/first/working prototype Our first prototype digital camera appeared back in 1976.
a prototype of/for sth The firm and its industrial partners plan this summer to put a prototype of an underwater power platform off the Florida coast.