MelinePlus, with the MedlinePlus Medical Encyclopedia, is a website network containing health information from the world's largest medical library, the United States National Library of Medicine, in cooperation with the National Institutes of Health. The website also contains an online medical dictionary, drug/herbal index, and a news service for medical news reports. The site is intended to be used by health care providers and patients, and designed to provide up-to-date, authoritative information. MedlinePlus is updated daily.