Morphean is an adjective that means related to or producing sleep.
Morpheus was the Greek god of dreams. Our word of the day can, in come cases simply be used to refer to Morpheus or it may mean drowsy, a state that sends us to sleep and, of course, to our dreams.
Something about the movie’s tone had a morphean quality to it. All those tranquil images and sounds made me want to sleep for several hours.