Noun
English Wikipedia has an article on:hypnagogiaWikipedia
hypnagogia (uncountable)
(medicine) A condition characterized by dreamlike auditory, visual, or tactile sensations when half-awake.
Mental phenomena during hypnagogia include lucid thought, lucid dreaming, hallucinations and sleep paralysis. Source: Internet
The researchers kept the subjects in hypnagogia for as long as possible by issuing new trigger words each time they started to fall asleep. Source: Internet