The medical term for a "tied tube" is tubal ligation. It's a surgical procedure where a woman's fallopian tubes are permanently closed to prevent eggs from reaching the uterus and being fertilized. Other common synonyms for tubal ligation include tubectomy, fallopian tube occlusion, and sterilization surgery. Essentially, all of these terms refer to a procedure that prevents a woman from becoming pregnant. While tubal ligation is a highly effective form of birth control, it's important to note that the procedure is generally irreversible, so women who undergo the surgery should be certain that they do not want to have children in the future.