Hypnagogic

hypnagogic \ˌhip-nə-ˈgä-jik, -ˈgō-\ adjective: of, relating to, or occurring in the period of drowsy semiconsciousness immediately preceding sleep

Etymology: French hypnagogique, from Greek hypn- sleep + -agōgos leading, inducing

Check in tomorrow for hypnagogic’s dream twin.