SLEEP

Medi - is a prefix referring to the middle.  e.g. Median - media - medial.  The Mediterranean Sea was in the middle of the world when it was named (the word translates to in the middle of the land).

How about the word Meditation!   How did it end up with the prefix medi-?   I think it's called that because when you meditate you bring your brain into a location somewhere between conscious awareness and subconscious dreaming.  It's a great place to be.

Relative to that is lucid dreaming.  A lucid dream is one in which, while you are asleep, you are aware that you are dreaming. Many people have experienced it at one time or another.

Many people practice lucid dreaming.  In a lucid dream, you have some control over what happens.  Lucid dreams can be restarted with practice.  Some think you can cure your phobias with lucid dreaming.  Both meditation and lucid dreaming are closely aligned with some practices of Eastern religions.

o.o