• Chemical Dictionaries:
  Beilstein Chemical Dictionary
• General:
  Dictionary of Scientific Quotations
  OneLook Dictionaries
  Thesaurus.com Roget’s Thesaurus online.
• Medline Plus Dictionaries

Directory of Health Organizations Online (DIRLINE)
DIRLINE is the National Library of Medicine's online database containing location and description information on various organizations, research resources, projects, databases, and electronic bulletin boards concerned with health and biomedicine.

 
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