Bible Encyclopedias
Ambrosianum

Cyclopedia of Biblical, Theological and Ecclesiastical Literature

a word in old liturgical writings denoting a hymn, from St. Ambrose having been the first to introduce metrical hymns into the service of the Church. Originally the word may have indicated that the particular hymn was the composition of St. Ambrose, and hence it came to mean any hymn.

Bibliography Information
McClintock, John. Strong, James. Entry for 'Ambrosianum'. Cyclopedia of Biblical, Theological and Ecclesiastical Literature. https://www.studylight.org/​encyclopedias/​eng/​tce/​a/ambrosianum.html. Harper & Brothers. New York. 1870.