Trisagion

noun

Tris·​agion

trēˈsȧyȯn

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

Word History

Etymology

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

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