%trental%

n. [ LL. trentale, fr. L. triginta thirty; akin to tres three: cf. OF. trentel. See Three, and cf. Trigintal. ] 1. (R. C. Ch.) An office and mass for the dead on the thirtieth day after death or burial. “Their trentals and their shrifts.” Spenser. [ 1913 Webster ]

2. Hence, a dirge; an elegy. [ 1913 Webster ]