Source : Webster's Revised Unabridged Dictionary (1913)

Noctambulism \Noc*tam"bu*lism\, n.
   Somnambulism.

Source : WordNet®

noctambulism
     n : walking by a person who is asleep [syn: {sleepwalking}, {somnambulism},
          {somnambulation}, {noctambulation}]