lit·ur·gy 
(lĭtər-jē)
(lĭtər-jē)n. pl. lit·ur·gies
1. A prescribed form or set of forms for public religious worship.
2. often Liturgy Christianity The sacrament of the Eucharist.
[Late Latin lītūrgia, from Greek leitourgiā, public service, from leitourgos, public servant, from earlier lēitourgos : lēiton, town hall (from lēos, dialectal variant of lāos, people) + ergon, work; see werg- in the Appendix of Indo-European roots.]