Embase is an online database providing coverage of one of the largest selections of biomedical literature available, including:
8500+ currently published journals from 90+ countries, nearly 3000 of which are not indexed by PubMed or Medline
32 million+ records
grey literature, including 3 million abstracts from 7000+ conferences dating back to 2009
extensive drug and pharmacy literature
historical literature dating back to 1947
Embase facilitates precision searching with several distinct search types and extensive search refinement tools. It utilizes a hierarchically-structured controlled vocabulary called Emtree.