Medical Dictionary

Health Glossary

Demystifying medical language. Browse or search for clear, human-centered explanations of common medical terms.

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A method of protecting the body against certain diseases by training the immune system to recognize infections. Vaccines help reduce…

A vein is a blood vessel that carries blood back towards the heart. Most veins transport oxygen-poor blood from the…

A machine that helps a person breathe when they cannot breathe adequately on their own. Ventilators are commonly used in…

A tiny infectious agent that needs living cells to reproduce. Viruses can cause illnesses such as: Antibiotics do not treat…

A substance the body needs in small amounts for proper health and body function. Vitamins help support: Related:

A lack of enough vitamins needed for normal body function. Deficiencies may affect: Related:

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