Definition of "oratio" []

• In liturgiology, a prayer, especially a collect; in the plural, post-communion prayers corresponding in number to the collects. (noun)

The Century Dictionary (Public Domain)

• "Although the Latin term oratio dominica is of early date, the phrase"
• "How - ever, other words (such as oratio, elocutio) were more often used, and the concept of style naturally goes back to the earliest Greek writings on rhetoric."
• ""oratio" (if there be no commemoration prescribed)."