Hypnagogia

Hypnagogia [hypnagogic] (from French: hypnagogique, from Greek: ὕπνος, húpnos, "sleep" + ἀγωγός, agōgós, "leading"; hence, "leading to sleep") is the state of consciousness that exists between wakefulness and sleep (as in a person falling asleep), as opposed to hypnopompia, the state between sleep and wakefulness (as in a person awakening from sleep).