succubi n.
女妖, 妖魔
Succubus \Suc"cu*bus\, n.; pl. {Succubi}. [See {Succuba}.]
1. A demon or fiend; especially, a lascivious spirit supposed
to have sexual intercourse with the men by night; a
succuba. Cf. {Incubus}.
2. (Med.) The nightmare. See {Nightmare}, 2.