Bible Dictionaries
Retrochoir

Webster's Dictionary

(n.) Any extension of a church behind the high altar, as a chapel; also, in an apsidal church, all the space beyond the line of the back or eastern face of the altar.

Bibliography Information
Webster, Noah. Entry for 'Retrochoir'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​r/retrochoir.html. 1828.