temp.mem.class p1 twice uses the term "class member" even though it is part of a subclause entitled "Member classes of class templates":

1 A class member of a class template may be defined outside the class template definition in which it is declared. [Note: The class member must be defined before its first use that requires an instantiation (14.7.1). For example, […]

I believe that "class member" is at best misleading in this context and infer from the heading that "member class" is the intended term in both cases above.