Definitions for vasectomyvæˈsɛk tə mi, veɪˈzɛk-
Random House Webster's College Dictionary
va•sec•to•myvæˈsɛk tə mi, veɪˈzɛk-(n.)(pl.)-mies.
surgical excision of part or all of the vas deferens to effect sterility in men.
Origin of vasectomy:
1895–1900; vas (deferens)+ -ectomy
surgical procedure that removes all or part of the vas deferens (usually as a means of sterilization); is sometimes reversible
The surgical removal of all or part of the vas deferens, usually as a means of male sterilization.
U.S. National Library of Medicine
Surgical removal of the ductus deferens, or a portion of it. It is done in association with prostatectomy, or to induce infertility. (Dorland, 28th ed)