What is the term used for the liturgical celebration of the Eucharist in the Roman Catholic faith?

The term used for the liturgical celebration of the Eucharist in the Roman Catholic faith is "Mass." This is the central act of worship in the Catholic Church, where the community gathers to celebrate the sacrament of the Eucharist, which involves the consecration of bread and wine that are believed to become the Body and Blood of Christ. The Mass includes various components such as readings from Scripture, prayers, and hymns, all focused on the sacrificial nature of the Eucharist and the celebration of salvation.

In contrast, while "Service," "Communion," and "Litany" are related to aspects of Christian worship, they do not specifically denote the Roman Catholic celebration of the Eucharist itself. "Service" often refers to a broader worship experience or gathering, "Communion" can refer to the act of receiving the Eucharist but does not encompass the entirety of the liturgical celebration, and "Litany" generally refers to a series of petitions or prayers, rather than the Mass as a whole. Therefore, Mass is the precise term that accurately describes this significant liturgical event.