proto-

Từ điển Việt Anh Việt 4in1 - English Vietnamese 4 in 1 Dictionary

proto- /prəʊtəʊ, -tə $ proʊtoʊ, -tə/ BrE AmE prefix
[Language: Late Latin; Origin: Greek, from protos 'first']
technical existing or coming before other things of the same type:
a proto-fascist group
a prototype