trental

trental [tren-tl] Word Origin noun Roman Catholic Church.

1. a series of 30 Requiems celebrated one each day for 30 consecutive days.

Origin of trental 1300–50; Middle English Medieval Latin trentāle, equivalent to Vulgar Latin *trent(a) (for Latin trīgintā thirty) + Latin -āle -al2. Cf. Old French trentel