Webster's Revised Unabridged Dictionary · 1913

Menologium

Menologium , noun

[New Latin menologium, from Greek mh`n month + lo`gos discourse: compare French ménologe.]

1.
A register of months. — Bp. Stillingfleet
2.
(Greek Church) A brief calendar of the lives of the saints for each day in the year, or a simple remembrance of those whose lives are not written.

Also: Menology