Definition of "euouae" in English

noun

1. In medieval music, a mnemonic for the Latin words saeculōrum and āmēn (from “ […] in saecula saeculōrum. Āmēn.” from the Gloria Patri doxology), used in liturgical works to indicate how the words should be sung with various cadences.

2. (by extension) A cadence used to sing those words of the Gloria Patri.