The Collaborative International Dictionary
Hypnogenic
Hypnogenic \Hyp`no*gen"ic\, a. [Gr. ? sleep + root of ? to be
born.] (Physiol.)
Relating to the production of hypnotic sleep; as, the
so-called hypnogenic pressure points, pressure upon which is
said to cause an attack of hypnotic sleep.
--De Watteville.
Wiktionary
hypnogenic
a. Producing hypnotic sleep.