Visual Medical Dictionary
http://www.curehunter.com/public/dictionary.do

It goes beyond regular dictionaries by displaying an ontology context tree (MeSH based) and interactive network graph of related drugs, diseases and therapies. For example: a search for “obesity” will show a strong relationship with “Insulin” and “Exercise” among other drugs and therapies. This has been added to Healthcare Resources Subject Tracer™ Information Blog. This has been added to the script code for eHealthcareBot Search Engine. This has been added to Biological Informatics Subject Tracer™ Information Blog.