A dataset of 31,110 medical subject headings from the NLM MeSH (Medical Subject Headings) 2026 thesaurus, including preferred terms, entry terms (synonyms), hierarchical tree numbers, scope notes, and category classifications. MeSH is the controlled vocabulary used for indexing PubMed and other NLM databases.
Source
NLM MeSH 2026 (https://www.nlm.nih.gov/mesh/); public domain. Courtesy of the U.S. National Library of Medicine.
Variables
term. preferred MeSH heading name
mesh_id. MeSH Descriptor UI (e.g., "D000001")
synonyms. entry terms / cross-references, comma-separated
tree_number. primary hierarchical tree number (e.g., "D02.092")
tree_numbers_all. all tree numbers, comma-separated
category. top-level category name (e.g., "Diseases", "Chemicals and Drugs")
category_name. same as category (for consistency)
scope_note. definition / scope note from MeSH (may be NA)
source. data source attribution