Psalterium

Psalterium may refer to:


 * Psalterium (book), book of Psalms
 * Psalterium (instrument), a stringed musical instrument, the name of which is synonymous with the psaltery
 * Psalterium (neuroanatomy), a structure in the commissure of fornix
 * Psalterium Georgii, a constellation
 * Omasum, the third stomach of ruminants