Triduum is a 7 letter English word. It's valid Scrabble word worth 10 points. It's valid Words with friends word worth 13 points.
You can make 94 anagrams from letters in triduum (dimrtuu).
1880-85; Latin trīduum period of three days, equivalent to trī- tri- + -duum *diwom, akin to diēs day (long i perhaps after postrīdiē on the following day)
Without a procession, however, the triduum of the great Pope of the Crusades was a great success in 1882.