Troper
A book containing tropes, that is, musical and textual additions to the chants of the Mass or Divine Office.
A book containing tropes, that is, musical and textual additions to the chants of the Mass or Divine Office. Tropers are known from the early Middle Ages On.
Michelle Brown, Understanding Illuminated Manuscripts (Malibu, CA: J. Paul Getty Museum in association with the British Library, c1994).