RETROCHOIR
Source: 567
Re″tro‐choir (?), n. [[Pref. retro- + choir.]] (Eccl. Arch.) 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.
Source: 567
Re″tro‐choir (?), n. [[Pref. retro- + choir.]] (Eccl. Arch.) 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.