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vasectomy va·sec·to·my (və-sěk'tə-mē, vā-zěk'-)
Surgical removal of all or part of the vas deferens, usually as a means of sterilization. Also called deferentectomy, gonangiectomy.
A surgical procedure in which the ducts that carry sperm out of the testes are cut and tied off so that no sperm can pass. Vasectomy is a form of male sterilization and is used as a method of birth control. The procedure has no effect on a man's capacity to produce semen; the only difference is that his semen will no longer contain sperm.