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Glossaries - J

We've defined thousands of terms related to health care. This page discusses glossary terms with the letter J.

Jaundice (JAWN-dus)

A symptom of many disorders. Jaundice causes the skin and eyes to turn yellow from too much bilirubin in the blood. See also Hyperbilirubinemia.

Jejunum (juh-JOON-um)

The middle section of the small intestine between the duodenum and ileum.

Jejunostomy (juh-joo-NAW-stuh-mee)

An operation to create an opening of the jejunum to a hole (stoma) in the abdomen. See also Enteral Nutrition.

Normal Joint


The place where two bones meet. Most joints are composed of cartilage, joint space, fibrous capsule, synovium, and ligaments.

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Joint space

The area enclosed within the fibrous capsule and synovium.

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Juvenile rheumatoid arthritis

A chronic arthritis of childhood that causes pain, stiffness, swelling, and loss of function in the joints and may also affect other parts of the body.

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