The Collaborative International Dictionary of English v.0.48:

Symphyseotomy \Sym`phy*se*ot"o*my\, n. [NL. symphysis pubis +
   Gr. ? to cut.] (Surg.)
   The operation of dividing the symphysis pubis for the purpose
   of facilitating labor; -- formerly called the Sigualtian
   section. [Written also symphysotomy.] --Dunglison.
   [1913 Webster]