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PubMed (/ˈpʌb.mɛd/) is a free search engine that primarily accesses the MEDLINE database of references and abstracts on life sciences and biomedical topics. The United States National Library of Medicine (NLM) at the National Institutes of Health maintains the database as part of the Entrez system of information retrieval.


The term "PubMed" is a portmanteau of "Public/Publisher" and "MEDLINE", indicating its origin as a public access point to the MEDLINE database.


PubMed was first released in January 1996. Initially, it provided free access to the MEDLINE database. Over the next few years, it gradually added other databases, which now include substance names and chemical structures, DNA and protein sequences, taxonomy, and others.


PubMed allows users to search for medical literature, including medical journals, abstracts, and medical articles. It also provides links to full-text articles where available. The database is updated daily and includes articles from the 1960s to the present.

Related Terms

  • MEDLINE: An important database of life sciences and biomedical information. It includes bibliographic information for articles from academic journals covering medicine, nursing, pharmacy, dentistry, veterinary medicine, and health care.
  • Entrez: The integrated search and retrieval system used by the National Center for Biotechnology Information (NCBI) for the major databases, including PubMed, Nucleotide and Protein Sequences, Protein Structures, Complete Genomes, Taxonomy, and others.
  • National Library of Medicine (NLM): The world's largest biomedical library which maintains and makes available a vast print collection and produces electronic information resources on a wide range of topics.
  • National Institutes of Health (NIH): A part of the U.S. Department of Health and Human Services, NIH is the nation’s medical research agency.

External links


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