type of ancient stringed instrument, the accompanying instrument for psalms, c. 1300, sautrie, from Old French psalterie (12c.) and directly from Latin psalterium "stringed instrument," from Greek psaltērion "stringed instrument," from psallein "play on a stringed instrument, pull, pluck" (see psalm).
From c. 1200 in English in Latin form salteriun. It was similar to a harp, but of different shape and means of obtaining resonance (having a sound-board behind and parallel with the strings). Related: Psalterial; psalterian.