hagioscope

noun

ha·​gio·​scope ˈha-gē-ə-ˌskōp 

ˈhā-jē-

: an opening in the interior walls of a cruciform church so placed as to afford a view of the altar to those in the transept

hagioscopic

ˌha-gē-ə-ˈskä-pik 

ˌhā-

-jē-

adjective

Word History

First Known Use

circa 1840, in the meaning defined above