What does apocrisiary or apocrisiarius mean?
The definition of apocrisiary and apocrisiarius
Ap`o*cris”i*a*ry, Ap`o*cris`i*a”ri*us, n.
Etym: [L. apocrisiarius, apocrisarius, fr. Gr. (Eccl.)

A delegate or deputy; especially, the pope’s nuncio or legate at Constantinople.