Prvalue

Together, prvalues and xvalues are called “rvalues,” reflecting the use of that term in the library clauses and the intended uses in reference binding, overload resolution, and template argument deduction.

In Pittsburgh (and a few places later), I had the opportunity to explain this terminology to several people. It can be done in a few minutes. I think it has prvalue (Groan!).

If the expression is categorized as an rvalue, the next evaluation can categorize it as a prvalue or xvalue.