invocational

noun

1. the act of calling on God, a god, a saint, the Muses, etc. for blessing, help, inspiration, support, or the like
2. 1. a formal prayer used in invoking, as at the beginning of a church service
   2. a formal plea for aid from a Muse, god, etc., at the beginning of an epic or similar poem
3. 1. a conjuring of evil spirits
   2. an incantation used in conjuring

Origin: OFr < L invocatio < pp. of invocare: see invoke