The Collaborative International Dictionary of English v.0.48:

Tournure \Tour*nure"\, n. [F., fr. tourner to turn.]
   [1913 Webster]
   1. Turn; contour; figure.
      [1913 Webster]

   2. Any device used by women to expand the skirt of a dress
      below the waist; a bustle.
      [1913 Webster] Touse

The Collaborative International Dictionary of English v.0.48:

Bustle \Bus"tle\, n.
   A kind of pad or cushion worn on the back below the waist, by
   women, to give fullness to the skirts; -- called also
   bishop, and tournure.
   [1913 Webster]