εὐχολογίαν, a Greek term, signifying literally a discourse on prayer. The word is formed of εὔχεσθαι prayer, and λόγος discourse.

The Euchologium is properly the Greek ritual, wherein are prescribed the order and manner of every thing relating to the order and administration of their ceremonies, sacraments, ordinations, &c.

F. Goar has given us an edition of the Greek Euchologium in Greek and Latin, with notes, at Paris.