com·mis·sur·ot·o·my (k
ŏm

ə-sh

-r
ŏt

ə-mē)
n. pl. com·mis·sur·ot·o·mies Surgical incision of a commissure in the body, as one made in the heart to relieve constriction of the mitral valve or one made in the brain to treat certain psychiatric disorders.
[TahlilGaran] American Dictionary ▲