hynagogic

Adjective

hypnagogic (comparative more hypnagogic, superlative most hypnagogic)

1. That induces sleep; soporific, somniferous.
2. That accompanies falling asleep; especially, pertaining to the semi-conscious period immediately preceding sleep.
   • But if we are in the right mood, a second of such lethargy is enough to make a hypnagogic [translating hypnagogische] hallucination appear, after which perhaps we reawaken, until the oft-repeated performance is brought to an end by sleep.1999, Joyce Crick, translating Sigmund Freud, The Interpretation of Dreams, I.c