Bible Encyclopedias
Hagioscope

Cyclopedia of Biblical, Theological and Ecclesiastical Literature

a word used by English ecclesiastical writers to describe openings made through different parts of the interior walls of the church, generally on either side of the chancel arch, so as to afford a view of the altar to those worshipping in the aisles.

Bibliography Information
McClintock, John. Strong, James. Entry for 'Hagioscope'. Cyclopedia of Biblical, Theological and Ecclesiastical Literature. https://www.studylight.org/​encyclopedias/​eng/​tce/​h/hagioscope.html. Harper & Brothers. New York. 1870.