an ancient musical instrument consisting of a flat sounding box with numerous strings which are plucked with the fingers or with a plectrum.
(initial capital letter) the Psalter.
Louise returned to her chair, and Eugénie took her psaltery from the floor, sat down and began to play.
— Charles Gill , The Rich Woods , 2008
Then she heard music from beyond the arbor walk, a lighthearted turn on a psaltery…
— Margaret Frazer , The Murderer’s Tale , 1996
Psaltery came to English in the 14th century from the Greek psalterion meaning “stringed instrument.”