Source : Webster's Revised Unabridged Dictionary (1913)

Somnial \Som"ni*al\, a. [L. spmnialis dream bringing, fr.
   somnium dream, fr. somnus sleep.]
   Of or pertaining to sleep or dreams.

         The somnial magic superinducted on, without suspending,
         the active powers of the mind.           --Coleridge.