A Comparison of Emtree® and MeSH®The Emtree thesaurus is a hierarchically structured, controlled vocabulary for biomedicine and the related life sciences. It includes a whole range of terms for drugs, diseases, medical devices and essential life science concepts. Elsevier’s biomedical experts use Emtree for deep, full-text indexing of all journal articles in Embase, ensuring maximum discoverability of biomedical evidence.