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

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.

Online Dictionary - Multiple dictionaries including: English dictionary, medical dictionary, legal dictionary, financial dictionary, computer dictionary, thesaurus, dictionary of acronyms and abbreviations, dictionary of idioms, thesaurus, Columbia e...

Free online English dictionary from Oxford, plus thesaurus, word of the day, resume examples, letter writing, and English grammar

The Free Online English Dictionary from Macmillan Publishers.

In-depth information on back pain, neck pain, lower back pain, sciatica and more, including articles, videos, forums and physician interviews.

Answers.com: Wiki Q&A combined with free online dictionary, thesaurus, and encyclopedias. Ask questions, get answers.

Mayo Clinic — Comprehensive medical diagnosis and treatment; locations and services; request an appointment.

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...