noun, often capitalized
ter·​sanctus | \ ˈtər, ˈter+\
plural -es

Definition of tersanctus

1 : sanctus
2 often capitalized : any hymn or invocation praising God as the thrice-holy deity

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History and Etymology for tersanctus

New Latin, literally, thrice holy (translation of Late Greek trisagios), from Latin ter three times + sanctus holy

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