somnial

from The Collaborative International Dictionary of English v.0.48

Somnial \Som"ni*al\, a. [L. somnialis dream bringing, fr.
   somnium dream, fr. somnus sleep.]
   Of or pertaining to sleep or dreams.
   [1913 Webster]

         The somnial magic superinduced on, without suspending,
         the active powers of the mind.           --Coleridge.
   [1913 Webster]