\Eu`cho*lo"gi*on\, Euchology \Eu*chol"o*gy\, n. [NL.
euchologion, Gr. ? prayer book; ? prayer, vow (fr. ? to pray)
+ ? to say, speak.] (Eccl.)
A formulary of prayers; the book of offices in the Greek
Church, containing the liturgy, sacraments, and forms of
prayers.