of·fer·to·ry 
(ôfər-tôr′ē, ŏfər-)
(ôfər-tôr′ē, ŏfər-)n. pl. of·fer·to·ries
1. often Offertory
a. One of the principal parts of the Eucharistic liturgy at which bread and wine are offered to God by the celebrant.
b. A musical setting for this part of the liturgy.
2. A collection of offerings at a religious service.
[Middle English offertori, from Late Latin offertōrium, from Latin offerre, to offer; see OFFER.]