What is the Roman Catholic view on using the term 'orthodox', particularly in regard to Eastern Orthodoxy?

The terms **orthodox** and **catholic** have immense significance to those that seek to make exclusive truth claims about their particular Christian Tradition. Both Roman Catholics and Eastern Orthodox trace their descent from (prior to schism) one catholic and orthodox Church. As a result, it would seem to be virtually impossible to concede the exclusive use of one of these terms to "the other side". **How does the Roman Catholic Church view using the terms orthodox or Orthodox generally, but particularly in regard to describing Eastern Orthodoxy?** This is one of a number of related questions I intend to ask regarding the Great (East-West) Schism, terminology and self-identication of the resulting Churches. The others so far: - How do the Eastern Orthodox view using the term 'catholic', particularly in regard to Roman Catholicism? - At what point did the Roman see start self-identifying as the Catholic Church? - At what point did the Eastern Church start self-identifying as the Orthodox Church?