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Medical Dictionary

Health Glossary

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

Sanitation

Systems and practices that help maintain clean and healthy living conditions. Good sanitation helps reduce the spread of disease. Examples…
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Scar

A scar is an area of fibrous tissue that replaces normal tissue as part of the body’s healing process after…
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Screening

Medical testing used to look for disease before symptoms appear. Screening can help detect illnesses early when treatment may work…
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Sebum

Sebum is a natural oily substance produced by sebaceous glands that helps lubricate, waterproof, and protect the skin and hair.…
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Sepsis

A life-threatening condition where the body reacts dangerously to an infection. Sepsis can lead to: Warning signs may include: Related:
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Severe

Very serious or intense. A severe illness or symptom is more dangerous and may require urgent medical care. Examples: Related:
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Skin

The skin is the body’s largest organ and forms a protective covering over the entire body. The skin protects against…
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Stroke

A medical emergency that happens when blood flow to part of the brain is interrupted. Stroke can cause: Early treatment…
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Surveillance

The continuous monitoring of diseases and health events within populations. Public health surveillance helps detect outbreaks and health trends early.…
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Sweat

Sweat is a clear fluid produced by sweat glands to help regulate body temperature. Sweat itself does not cause acne.…
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