Vasotomy is a medical term that refers to a surgical procedure in which a small incision is made in the vas deferens to disrupt the flow of sperm. There are several synonyms for this term, such as vas occlusion, vas ligation, and vasectomy. These procedures are commonly used as a method of male contraception and sterilization. Vas occlusion involves blocking the vas deferens with a specially designed plug or device, while vas ligation involves tying off the vas deferens. Vasectomy is a more general term that refers to any surgical procedure in which the vas deferens is cut or blocked to prevent the flow of sperm. All of these procedures are highly effective in preventing pregnancy and are relatively simple to perform.