O / offertōrĭum
noun

offertōrĭum

gen. offertōrii · gender neuter · decl. 2nd
a place to which offerings were brought; an offertory
a place to which offerings were brought, an offertory (eccl. Lat.): offertorium tali ex causā sumpsit vocabulum. Fertum enim dicitur oblatio, quae altari offertur, et sacrificatur a pontificibus, a quo offertorium nomina tur, quasi propter fertum, Isid. Orig. 6, 19.