cyrillienadjectiveSyllable DecompositioncyrillienEtymologyexpandfrom Cyrille (Constantine the Philosopher) with the suffix -ian.Definitions1. Relating to the Cyrillic alphabet, a Serbian alphabet said to have been invented by Saint Cyril.expand2. Cyrillic literature. The body of Slavic works on the Scriptures, executed in the 8th and 9th centuries.by extensionexpandSee alsocyrillique (adj.)