the GNU version of the Collaborative International Dictionary of English
adj. Of or pertaining to sleep or dreams.
The Century Dictionary and Cyclopedia
Pertaining to or involving dreams; relating to dreams.
Word Usage
"During this state of continuous, not single-mindedness, but one-side-mindedness, writing is manual somnambulism; the somnial magic superinduced on, without suspending, the active powers of the mind."