A liturgical book comprised of the prayers and directives for Mass, and various sacramental formulas; it does not include the Scripture readings for the Mass, which are collected in the lectionary. Sacramentaries were used in many countries up to the thirteenth century, but were gradually replaced by Missals -- particularly the Roman Missal, which included the sacramentary, the lectionary, and the (Roman) gradual. Prescribed by the Second Vatican Council, the current sacramentary renders the prayers for Mass in the vernacular.

Joseph Quinn—(Source: The Modern Catholic Encyclopedia.)