名詞 invocation:

1. a prayer asking God's help as part of a religious service
   同義詞：supplication
2. an incantation used in conjuring or summoning a devil
3. calling up a spirit or devil
   同義詞：conjuring, conjuration, conjury
4. the act of appealing for help

in.vo.ca.tion

n.（名詞）
The act or an instance of invoking, especially an appeal to a higher power for assistance.
乞靈：乞靈的行動或事例，尤指祈求一種更高的力量給予幫助
A prayer or other formula used in invoking, as at the opening of a religious service.
禱文：乞靈時所用的祈禱文或其它程式，如在宗教活動開始時所用的禱文等

The act of conjuring up a spirit by incantation.
召鬼：用咒語來召鬼的行動
An incantation used in conjuring.
召鬼時所用的咒語

來源：
Middle English invocacion
中古英語 invocacion
from Old French
源自 古法語
from Latin invoc3tiô invoc3tiôn-
源自 拉丁語 invoc3tiô invoc3tiôn-
from invoc3tus [past participle of] invoc3re [to invoke] * see invoke
源自 invoc3tus [] invoc3re的過去分詞 [乞靈；召鬼] *參見 invoke

【引伸】
in.voca.tional
adj.（形容詞）