Health Glossary

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

Chromosome

A thread-like structure made of DNA and associated proteins that carries genetic information within a cell. In humans, chromosomes are…
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Chronic

Describing a condition, disease, or process that persists or recurs over a prolonged period of time. “Chronic” refers primarily to…
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Climate Change

Climate change is a long-term change in the average conditions or variability of Earth’s climate, including temperature, rainfall, wind patterns,…
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Cochlea

The cochlea is a spiral-shaped structure in the inner ear responsible for converting sound-induced mechanical vibrations into electrical signals that…
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Collagen

Collagen is the body’s most abundant structural protein and provides strength and support to many tissues. Collagen is found in…
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Confusion

A state in which a person has difficulty thinking clearly, understanding their surroundings, processing information, or maintaining normal awareness. Confusion…
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Congenital

Present at birth, whether caused by genetic factors, developmental processes, environmental exposures before birth, or a combination of factors. A…
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Contagious

Capable of being transmitted from one person to another, directly or indirectly, through an infectious agent. A contagious disease can…
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Corrosion

Corrosion is the deterioration of a material, especially a metal, caused by chemical or electrochemical reactions with its environment. A…
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Cortisol

Cortisol is a steroid hormone that helps regulate metabolism, immune activity, blood pressure, and the body’s response to stress. Cortisol…
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COVID-19

An infectious disease caused by infection with the virus SARS-CoV-2. COVID-19 primarily affects the respiratory system but can involve multiple…
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