Would you be kind enough to define these terms?
Sure, and if anyone out there knows Latin, feel free to correct my grammar, too:
Prima Scriptura = Scripture First
Nulla Contra Scripturam = Nothing Contrary to Scripture
Sola Scriptura (Scripture Alone), rules out the possiblity of retaining traditions and practices that do not appear in the Bible but are not contrary to it. (As to which those are, that's a long thorny debate.) Of course the Reformers never really meant "Sola Scriptura" in that sense, but confusion has since arisen.