WordReference Random House Unabridged Dictionary of American English © 2020
tren•tal  (trentl),USA pronunciation n. [Rom. Cath. Ch.]
  1. a series of 30 Requiems celebrated one each day for 30 consecutive days.
  • Medieval Latin trentāle, equivalent. to Vulgar Latin *trent(a) (for Latin trīgintā thirty) + Latin -āle -al2. Cf. Old French trentel
  • Middle English 1300–50


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