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The National Library of Medicine (NLM), on the campus of NIH in Bethesda, Maryland, is the world

Explore the updated online encyclopedia from Encyclopaedia Britannica with hundreds of thousands of articles, biographies, videos, images, and web sites.

Breaking science news and articles on global warming, extrasolar planets, stem cells, bird flu, autism, nanotechnology, dinosaurs, evolution -- the latest discoveries in astronomy, anthropology, biology, chemistry, climate & environment, computer...

Find information about orthopedics, with resources on a wide range of topics encompassing many common orthopedic problems. Learn about orthopedic ailments and their treatments.

Health information for consumers on first aid for medical emergencies, accidents and injuries, symptoms and treatment of disease and health conditions, and physical and the emotional well-being that contribute to general wellness.

Online Medical Dictionary and glossary with medical definitions

Bartleby.com publishes thousands of free online classics of reference, literature and nonfiction

Definition of word from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games.

Dictionary.com - the largest and most trusted free online dictionary. Instantly look up accurate and extensive definitions and word meanings, and hear audio pronunciations.

The eMedicine point-of-care clinical reference features up-to-date, searchable, peer-reviewed medical articles organized in specialty-focused textbooks, and is continuously updated with practice-changing evidence culled daily from the medical literat...