Definition of commissurotomy in English:

commissurotomy

noun

Medicine
  • 1The procedure of widening the orifice of a valve of the heart, especially the mitral valve, originally by incisions made at the commissures of the orifice and later also by other techniques; an instance of this.

  • 2The procedure of incising or dividing a commissure of the nervous system; an instance of this.

Origin

1940s. From commissure + -o- + -tomy.

Pronunciation

commissurotomy

/ˌkɒmɪsjəˈrɒtəmi//ˌkɒmɪʃəˈrɒtəmi/