incubuses

/IH0 NG K Y UW0 B AH0 S AH0 Z/
noun
  1. 1

    (mediaeval folklore) An evil spirit supposed to oppress people while asleep, especially to have sex with women as they sleep.

  2. 2

    A feeling of oppression during sleep, sleep paralysis; night terrors, a nightmare.

  3. 3

    (by extension) Any oppressive thing or person; a burden.

  4. 4

    (entomology) One of various of parasitic insects, especially subfamily Aphidiinae.