MeSH (Medical Subject Headings) are standardized keywords that refer to the content of an article.
Most of the articles in PubMed have been manually assigned MeSH Terms by indexers from the NLM (National Library of Medicine).
For the country Thailand, for example, there are many synonyms (e.g. Siam), but there are also many cities and areas in Thailand. It can then be difficult to make sure you name all the words that may be used if you want to find all the relevant articles about Thailand. Because the indexer of the NLM adds the MeSH Term 'Thailand' to articles about Thailand, you can still find it by searching on this MeSH term.
The MeSH database can be found in the start screen under 'Explore'.
find all kinds of other information about the MeSH term.
You can use the information of each MeSH Term to broaden or narrow your search.
NOTE: For new MeSH terms, check for the option: 'Previously indexed' to find older references on the same topic! The MeSH Database is updated annually. You can find the year the term is introduced under the MeSH term!
Click on the image to enlarge. Based on the work of University Library Nijmegen https://libguides.ru.nl/".