Source : Webster's Revised Unabridged Dictionary (1913)

Circumvolution \Cir`cum*vo*lu"tion\, n. [See {Circumvolve}.]
   1. The act of rolling round; the state of being rolled.

   2. A thing rolled round another. --Arbuthnot.

   3. A roundabout procedure; a circumlocution.

            He had neither time nor temper for sentimental
            circumvolutions.                      --Beaconsfield.

Source : WordNet®

circumvolution
     n : the act of turning or winding or folding around a central
         axis