Myotomy

from WordNet (r) 3.0 (2006)

myotomy
    n 1: surgical incision or division of a muscle

from The Collaborative International Dictionary of English v.0.48

Myotomy \My*ot"o*my\, n. [Myo- + Gr. ? to cut: cf. F. myotomie.]
   The dissection, or that part of anatomy which treats of the
   dissection, of muscles.
   [1913 Webster]