psalter

noun

1. The Book of Psalms. Often applied to a book containing the Psalms separately printed.
2. Specifically for Anglicans, the Book of Common Prayer which contains the Book of Psalms. For Catholics, the Breviary containing the Psalms arranged for each day of the week.
3. In the Roman Catholic Church, a rosary consisting of one hundred and fifty beads, corresponding to the number of the Psalms.
4. (obsolete or rare) psaltery (the musical instrument).