Bible Encyclopedias
Bortum

Cyclopedia of Biblical, Theological and Ecclesiastical Literature

is a kind of clerical dress; if of gold, it was called aurifrigium ("clamydes geminis aurifrigiis, quse vulgariter bortum dicuntur" Mart. Thesaur. Anecd. 4 538).

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