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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.

Psychology Today - Commentary, Research and News that cover all aspects of Human Behavior, from the workings of the brain, to relationships and the larger cultural forces that influence our decisions.

Medical Dictionary is intended for use by healthcare consumers, students, and professionals as well as anyone who wants to keep up with the burgeoning array of terminology found in today’s medical news. By staying clear of jargon, the dictionary o...

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...

The mission of the National Institute on Drug Abuse (NIDA) is to lead the Nation bringing the power of science to bear on drug abuse and addiction.

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

A healthy balance of the mind, body and spirit

Medical news and health news headlines posted throughout the day, every day

Groundbreaking developments in science, space, technology, health, and the environment

Online Medical Dictionary and glossary with medical definitions