PubMed is a database of bibliographic information developed by NCBI.
a version of MEDLINE provided by the National Library of Medicine. Originally designed to link the literature to genetic sequence data, it is now freely available on the Web. [ Instructional Materials -- Connect
The US National Centre for Biotechnology Information (NCBI) and US National Library of Medicine's freely available online database and search facility. It contains more than 11 million references to the many indexed biomedical journal articles that are in MEDLINE, PreMEDLINE and other related databases.