Euouae

Musical mnemonic

Euouae is an abbreviation used as a musical mnemonic in Latin psalters and other liturgical books of the Roman Rite. It stands for the syllables of the Latin words saeculorum Amen, taken from the Gloria Patri, a Christian doxology that concludes with the phrase in saecula saeculorum. Amen. The mnemonic is used in the notation of the variable melodic endings of psalm tones in Gregorian chant.

This keyword could refer to multiple things. Here are some suggestions: