PSALTERIUM Meaning of PSALTERIUM in English [ sɔ:l'tɪərɪəm , sɒl- ]■ noun another term for omasum .OriginC19: from L., lit. 'psalter' (see psalter ), because of its many folds of tissue, resembling pages of a book. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004