Etymology
From Middle English presbetory, presbytory (“part of church reserved for clergy”), from Late Latin presbyterium (“group of presbyters, part of church reserved for clergy”), from Ancient Greek πρεσβῠτέρῐον (presbŭtérĭon, “group of presbyters”), from πρεσβῠ́τερος (presbŭ́teros, “elder, priest”) + -ῐον (-ĭon). By surface analysis, presbyter + -y. Doublet of presbyterium.