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Related to canonical hours: Liturgy of the Hours
1. The times of day, historically including matins, lauds, prime, terce, sext, nones, vespers, and compline, at which canon law prescribes certain prayers to be said.
2. The prayers said at these times.
canonical hours- The seven canonical hours of the church were called tides, and tide—from an Indo-European root meaning "to divide"—is used with other words to denote a definite interval of time: noontide, Eastertide, eventide, summertide, etc.
See also related terms for tides.