Medical biographies
Dictionary of Medical Biography Biographies of over 1,000 doctors and practitioners.
Biographical Books 40,000 biographies and autobiographies arranged alphabetically by name. See the vocation index to locate physicians.
More biographical sources in history of medicine subject guide.
Medical/disease terminology
Dorland's Illustrated Medical Dictionary Source for information about medical terminology.
Oxford Reference Online Searches multiple reference books. Useful for definitions and brief information about terms and people in medical history. You can narrow down a search by specific subject area.
Cambridge Historical Dictionary of Disease Detailed entries for 161 diseases, describing both their histories and characteristics.
General history of medicine
Companion Encyclopedia of the History of Medicine
A Dictionary of the History of Medicine
The Cambridge World History of Human Disease