Search medical terms and abbreviations with the most up-to-date and comprehensive medical dictionary from the reference experts at Merriam-Webster. Master today's medical vocabulary.

By avoiding jargon, the dictionary offers concise and easily accessible information for users searching for descriptions of over-the-counter or prescription medications, medical abbreviations, test …

OpenMD's medical dictionary aggregates definitions from leading medical institutions and includes illustrations, phonetic pronunciations, and related terms.

advance care directive (or advance medical directive): A legal document that describes the kind of medical care a person want if an accident or illness leaves him or her unable to make or …

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The A.D.A.M. Medical Encyclopedia includes articles about diseases, tests, symptoms, injuries, and surgeries. Search encyclopedia articles from A to Z.

Use this free online medical dictionary search engine to research and learn about medical terminology, pharmaceutical drugs, healthcare equipment, health conditions, medical devices, medical …

The latest edition of Taber’s Medical Dictionary Online provides more than 75,000 definitions, 33,700 audio pronunciations, 1,300 images, and 130 videos. Add mobile access to download Taber’s onto …

Master medical terminology with Stedman's Online Medical Dictionary: 110,000+ terms, audio pronunciations, and customizable features for students and professionals.

Understand medical terms in clear, simple language. Fast explanations for diseases, symptoms, treatments, and medicines. Built for everyone.