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Trisagion

noun Tris·agion \ trēˈsȧyȯn \
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Definition of Trisagion

plural Trisagia \-yȧ\
1 : a hymn to or invocation of God as the thrice holy
  • the Trisagion of Isa 6:3
2 : a requiem service of the Eastern Church

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Origin and Etymology of trisagion

Middle Greek, from neuter of Late Greek trisagios thrice holy, from Greek tris- + hagios holy

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