A.D.A.M. Health Illustrated Encyclopedia (via MedlinePlus)
This encyclopedia includes over 4,000 articles about diseases, tests, symptoms, injuries, and surgeries. It also contains an extensive library of medical photographs and illustrations.
The Columbia Encyclopedia contains nearly 51,000 entries on a vast range of topics. With more than 80,000 hypertext cross-references, the current Sixth Edition is among the most complete and up-to-date encyclopedias ever produced.
Merriam-Webster’s Medical Desk Dictionary (via MedlinePlus)
Merriam-Webster OnLine provides a free online dictionary, thesaurus, audio pronunciations, and other English language resources.
Multilingual Glossary of Technical and Popular Medical Terms in Nine European Languages
This site contains the electronic form of eight glossaries, in which there are more than 1800 technical and popular medical terms in eight of the nine official European languages: English, Dutch, French, German, Italian, Spanish, Portuguese, and Danish.
Pronunciations: A Merck Manual Home Edition
Stedman's Online Medical Dictionary is an online resource for medical terminology definitions. Simply type in a word, or search by the first two letters of a word. If you're not sure of the spelling, type the first few letters, followed by an asterisk (*).