miserere

1. Alternative letter-case form of Miserere (“the 51st/50th Psalm”).

   The miserere, that is to say, have mercy on us, is a psalm, composed of stanzas, which are sung alternately in a very different manner.

   1807, [Germaine] de Staël Holstein, translated by D[ennis] Lawler, “[Book X. Holy week.] Chap[ter] IV.”, in Corinna; or, Italy. […], volume III, London: […] Corri, […]; and sold by Colburn, […], and Mackenzie, […], →OCLC, page 47

plural misereres

1. An expression of lamentation or complaint.
2. A medieval dagger, used for the mercy stroke to a wounded foe; misericord.
3. architectureA small projecting boss or bracket on the underside of the hinged seat of a church stall, intended to give some support to a standing worshipper when the seat is turned up; a misericord.
4. Ileus.

1. The 51st Psalm (50th in the older Greek and Latin numbering), beginning “Have mercy upon me, O God …” in the King James Version; sometimes set to music.

   One of the most impressive ceremonies of Holy Week is the chanting of the Miserere.

   1845, J. T. Headley, Letters from Italy, page 130

   2 more examples

   When someone did want to designate a short interval, the usual phrasing drew on religious vocabulary, calling up the duration of common prayers: the Paternoster, the Ave Maria, and the Miserere.

   2004, Joyce E. Salisbury, The Greenwood Encyclopedia of Daily Life: 15th and 16th Centuries, →ISBN, page 132

   Psalm 50, the “Miserere,” was linked to the Passion of Christ by a peculiar story from the thirteenth century known as the “rood legend,” a popular history concerning the wood of the Cross. According to that legend, David had composed the “Miserere” as penance for his sins under the very tree that provided the wood for the Holy Cross.

   2008, Lorenzo Candelaria, The Rosary Cantoral: Ritual and Social Design in a Chantbook from Early Renaissance Toledo, →ISBN, page 75