Synaxarion or Synexarion (plurals Synaxaria, Synexaria; Greek: Συναξάριον, from συνάγειν, synagein, "to bring together"; cf.
etymology of synaxis and synagogue; Latin: Synaxarium, Synexarium; Coptic: ⲥⲩⲛⲁⲝⲁⲣⲓⲟⲛ; Ge'ez: ሲናክሳሪየም(ስንክሳር); Arabic: ٱلسِّنْكِسَارُ/ٱلسَّنْكِسَارُ/ٱلسِّنَكْسَارُ, romanized: As-sinkisār/As-sankisār/As-sinaksār[1][2][3]) is the name given in the Eastern Orthodox, Oriental Orthodox and Eastern Catholic Churches to a compilation of hagiographies corresponding roughly to the martyrology of the Roman Church.
[5] The mere index of such lessons is generally called menologion heortastikon, a book now hardly needed or used, since the Typikon supplies the same, as well as other, information.
Krumbacher describes those composed by Christopher of Mytilene and Theodore Prodromus (twelfth century).
Emperor Basil II (976-1025) ordered a revision of the synaxarion, which forms an important element of the present official edition.