1) Incision of a muscle 2) Operation 3) Surgery 4) Surgical operation 5) Surgical procedure 6) Surgical process 
Myotomy describes a surgical procedure in which muscle is cut. A common example of a myotomy is the Heller myotomy. ...
• (n.) The dissection, or that part of anatomy which treats of the dissection, of muscles.
(mi-ot´ә-me) cutting or dissection of muscular tissue or of a muscle.
My·ot'o·my noun [ Myo- + Greek ... to cut: confer French myotomie .] The dissection, or that part of anatomy which treats of the dissection, of muscles. 
An operation to divide a muscle.
Type: Term Pronunciation: mī-ot′ō-mē Definitions: 1. Anatomy or dissection of the muscles. 2. Surgical division of a muscle.
[n] - surgical incision or division of a muscle
noun surgical incision or division of a muscle
incision of a muscle.