A Benedictional is a book containing a collection of benedictions or blessings in use in the Roman Catholic Church, essentially collected from those in sacramentary. The Anglo-Saxon Benedictional of St. Æthelwold is the most famous of the relatively infrequent illuminated manuscript examples, which are mostly Early Medieval. ...
• (n.) A book of benedictions.
Liturgical book that contains the Church's teaching on blessings and formulas for celebrating this sacrament in various different circumstances
Ben`e·dic'tion·al noun A book of benedictions. 
of or pertaining to benediction.