The Collaborative International Dictionary of English v.0.48:

Circumvolution \Cir`cum*vo*lu"tion\, n. [See Circumvolve.]
   [1913 Webster]
   1. The act of rolling round; the state of being rolled.
      [1913 Webster]

   2. A thing rolled round another. --Arbuthnot.
      [1913 Webster]

   3. A roundabout procedure; a circumlocution.
      [1913 Webster]

            He had neither time nor temper for sentimental
            circumvolutions.                      --Beaconsfield.
      [1913 Webster]

WordNet (r) 3.0 (2006):

circumvolution
    n 1: the act of turning or winding or folding around a central
         axis