the act or an instance of petitioning somebody for help or support
an incantation or prayer asking a deity or spirits God for help or support
the performance of magical rites in order to summon spirits, or a formula or incantation used for this
invocational adj
invocatory /inʹvokət(ə)ri/ adj
[Middle English invocacioun via French from Latin invocation-, invocatio, from invocare: see invoke]