Idiomelon
Idiomelon (Medieval Greek: ἰδιόμελον from idio-, 'unique' and -melon, 'melody'; Church Slavonic: самогласенъ, samoglasen)—pl. idiomela—is a type of sticheron found in the liturgical books used in the Eastern Orthodox Church, the Eastern Catholic Churches which follow the Byzantine Rite, and many other Orthodox communities like Old Believers.