Repetendum (Lat.: ‘to be repeated’)
- Richard Sherr
In Western chant, a section to be repeated, such as the refrain in hymns or the last part of the respond of a responsory, which is repeated after the psalm verse. In Ordo romanus I (second half of the 8th century) and later, the term ‘versus ad repetendum’ designated extra psalm verses added as needed to the Mass introit and communion. According to Husmann, the words ‘ad repetendum’ were also used in the Middle Ages for additional tropes to the introit antiphon....