1) Catholic liturgical book 
Menologium (from the Greek menológion, from mén `a month`; Latin menologium), also written menology, and menologe, is a service-book used in the Eastern Orthodox Church and those Eastern Catholic Churches which follow the Rite of Constantinople. From its derivation, menologium means `month-set`; in other words, a book arranged according to t...
• (n.) Alt. of Menology