pnigalion

noun2

1. •
   (historical) A nocturnal monster in Ancient Greece that would choke its victims; incubus; nightmare.

   • Because the Greeks considered being choked or strangled to be one consequence of a night-mare attack, the entity was also called pnigalion (“throttler”). — 2011
2. •
   (no longer used) sleep paralysis; nightmare

   • Incubus (synonyms, Pnigalion, ephialtes, epibole ) .— It is an elementary form of epilepsy . — 1936