noun

1. the Book of Psalms
2. a version of the Psalms for use in religious services

Etymology: altered (infl. by L) < ME sauter < OE saltere & OFr sautier, both < L psalterium, stringed instrument, in LL(Ec), the Psalms < Gr psaltērion, harp, in LGr(Ec), the Psalter < psallein, to twitch, pluck