Medical Dictionaries

Dictionary of Cancer Terms

This is a resource from the National Cancer Institute with more than 6,000 terms related to cancer and medicine.

MedlinePlus Medical Dictionary (NIH)

This dictionary is a service of  the U.S. National Library of Medicine.

MedTerms Medical Dictionary (Medicine.net)

Definitions for difficult medical language in easy-to-understand explanations of over 16,000 medical terms.

Who Named It? (Medical Eponyms)

This is a biographical dictionary of medical eponyms. It attempts to present a complete survey of all medical phenomena named for a person, with a biography of that person.

Other Reference sources

Lab Tests Online

A public resource on clinical lab testing

Merck Manual

The Merck Manuals is a series of healthcare books for medical professionals and consumers.

Practical Guide to Clinical Medicine: Vital Signs (UCSD)

A comprehensive physical examination and clinical education site for medical students and other health care professionals, from the University of California in San Diego.