vasectomy

n. surgical procedure in which the vas deferens are cut and tied in order to prevent the emission of sperm during ejaculation

Vasectomy is a permanent birth control method for men in which the vasa deferentia are cut, thus sterilizing the patient. There are some variations on the procedure such as no-scalpel (keyhole) vasectomies, in which a surgical hook, rather than a scalpel, is used to enter the scrotum.Vasectomy should not be confused with castration: vasectomy does not involve removal of the testicles and it does not affect either the production of male sex hormones (mainly testosterone) or their secretion into the bloodstream, therefore sexual desire (libido) is unaffected. The ability to have an erection and an orgasm with an ejaculation do not seem to be affected unless one suffers from post-vasectomy pain. Because the sperm-filled fluid from the testes makes up only about 10% of an ejaculation, vasectomy does not seem to significantly affect the volume, appearance, texture or taste of the ejaculate.
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A vasectomy is a surgical procedure performed on males in which the vas deferens are cut, tied, cauterized or otherwise [more]Vasectomy - Community and Resources

Noun
1. surgical procedure that removes all or part of the vas deferens (usually as a means of sterilization); is sometimes reversible
(hypernym) ablation, extirpation, cutting out, excision
(derivation) vasectomize, vasectomise

[vas-EK-toe-mee]
An operation to cut or tie off the two tubes that carry sperm out of the testicles.