Health Glossary

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

Rash

A rash is a visible change in the skin, such as changes in color, texture, or appearance, that may result…
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Receptor

A receptor is a specialized molecule or sensory structure that detects a specific signal, stimulus, or change and initiates or…
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Risk

The likelihood and potential severity of harm resulting from exposure to a hazard under particular circumstances. Risk depends on more…
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Risk Factor

A characteristic, exposure, behavior, condition, or circumstance associated with an increased likelihood of developing a disease or experiencing a health…
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RNA

Ribonucleic acid (RNA) is a biological molecule that stores, carries, or helps use genetic information in cells and in some…
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Roundworm

A roundworm is a parasitic worm with a generally cylindrical, elongated body, belonging to the group known as nematodes. Some…
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