NLM Gateway
A service of the U.S. National Institutes of Health
Your Entrance to
Resources from the
National Library of Medicine
Gateway HomeGateway HomeGateway Home
    Home      Term Finder      Limits/Settings      Search Details      History      My Locker     About      Help      FAQ    
Skip Navigation Side Barintended for web crawlers only
Skip Search Block and Navigation Side BarSkip Search Block
for vertical spacing only
Term Finder
for vertical spacing only

Find terms, their definitions, and related terms, using NLM's MeSH and UMLS Metathesaurus.


  • Medical Subject Headings (MeSH) is NLM's controlled vocabulary thesaurus. MeSH terminology provides a consistent way to retrieve information that may use different terminology for the same concepts.

  • NLM's Unified Medical Language System (UMLS) Metathesaurus contains information about biomedical concepts and terms from many sources.

Contact Us
U.S. National Library of Medicine |  National Institutes of Health |  Health & Human Services
Privacy |  Copyright |  Accessibility |  Freedom of Information Act |