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noun trid·u·um \ˈtri-jə-wəm, ˈtri-dyə-\

Definition of triduum

  1. :  a period of three days of prayer usually preceding a Roman Catholic feast

Origin and Etymology of triduum

Latin, space of three days, from tri- + -duum (akin to dies day) — more at deity

First Known Use: 1873

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