MEDLINE (Medical Literature Analysis and Retrieval System Online) is a bibliographic database of life sciences and biomedical information.
Compiled by the United States National Library of Medicine (NLM), it is freely available on the Internet and searchable via PubMed and NLM's National Center for Biotechnology Information's Entrez system.
It includes bibliographic information for articles from academic journals covering medicine, nursing, pharmacy, dentistry, veterinary medicine, and health care; it also covers much of the literature in biology and biochemistry, as well as fields such as molecular evolution.
The database contains more than 26 million records from 5,639 selected publications covering biomedicine and health from 1950 to the present. Originally the database covered articles starting from 1965, but this has been enhanced, and records as far back as 1950/51 are now available within the main index.
The database is freely accessible on the Internet via the PubMed interface and new citations are added Tuesday through Saturday. For citations added during 1995-2003: about 48% are for cited articles published in the U.S., about 88% are published in English, and about 76% have English abstracts written by authors of the articles.
Wikipedia, the free encyclopedia. Medline. Internet. Accessed on June 20, 2016.