MeSH is the National Library of Medicine's controlled vocabulary thesaurus of medical subject terms, or "Headings," arranged in a hierarchical structure that permits searching at various levels of specificity.
MeSH descriptors are arranged in both an alphabetic and a hierarchical structure. At the most general level of the hierarchical structure are very broad headings such as "Anatomy" or "Mental Disorders." More specific headings are found at more narrow levels of the thirteen-level hierarchy, such as "Ankle" and "Conduct Disorder." Also, unused terms are cross-referenced to the most appropriate MeSH Heading, for example, "Vitamin C" is an entry term to "Ascorbic Acid."
The four ProQuest databases listed to the right under "Articles from Nursing Journals & Trade Publications" use the MeSH thesaurus. To access the MeSH thesaurus: