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(dòng)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(shí)所用的祈禱文或其它程式，如在宗教活動(dòng)開(kāi)始時(shí)所用的禱文等

The act of conjuring up a spirit by incantation.
召鬼：用咒語(yǔ)來(lái)召鬼的行動(dòng)
An incantation used in conjuring.
召鬼時(shí)所用的咒語(yǔ)

來(lái)源：
Middle English invocacion
中古英語(yǔ) invocacion
from Old French
源自 古法語(yǔ)
from Latin invoc3tiô invoc3tiôn-
源自 拉丁語(yǔ) invoc3tiô invoc3tiôn-
from invoc3tus [past participle of] invoc3re [to invoke] * see invoke
源自 invoc3tus [] invoc3re的過(guò)去分詞 [乞靈；召鬼] *參見(jiàn) invoke

【引伸】
in.voca.tional
adj.（形容詞）