>I suspect the Latin term was "casus
rectus", but I cannot confirm that. "Rect."?
The Latin terms are casus rectus and casus obliquus (plurals: casus recti
and casus obliqui, "casus" since it is 4th not 2nd). The "casus recti" are
only the Latin Nominative and Vocative. The same terminology is used for
Classical Greek.
Peter