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Glossary

Showing 571-580 out of 1156 Terms

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  • Host cell

    (... sel)

    A cell that is infected by a virus or another type of microorganism.

  • Human leukocyte antigens

    HYOO-mun LOO-koh-site AN-tih-jen

    Antigens that appear on white blood cells as well as cells of almost all other tissues. By typing for HL-A antigens, donors and recipients of white blood cells, platelets, and organs can be "matched" insuring good performance and survival of transfused and transplanted cells.

  • Hydration

    (hy-DRAY-shun)

    The process of combining with water. In medicine, the process of giving fluids needed by the body.

  • Hydrocephalus

    HY-droh-SEH-fuh-lus

    The abnormal buildup of cerebrospinal fluid in the ventricles of the brain.

  • Hydrocortisone

    (HY-droh-KOR-tih-sone)

    A drug used to relieve the symptoms of certain hormone shortages and to suppress an immune response.

  • Hyper

    Prefix meaning ""more than"" normal.

  • Hyperactivity

    (HY-per-ak-TIH-vih-tee)

    A higher than normal level of activity. Hyperactivity can be used to describe the increased action of a body function, such as hormone production, or behavior. A person who is hyperactive may seem to be always moving or fidgeting, impulsive, unable to concentrate, and talking too much.

  • Hyperalimentation

    (HY-per-A-lih-men-TAY-shun)

    A form of nutrition that is delivered into a vein. Hyperalimentation does not use the digestive system. It may be given to people who are unable to absorb nutrients through the intestinal tract because of vomiting that won't stop, severe diarrhea, or intestinal disease. It may also be given to those undergoing high-dose chemotherapy or radiation and bone marrow transplantation. It is possible to give all of the protein, calories, vitamins and minerals a person needs using hyperalimentation. Also called parenteral nutrition, total parenteral nutrition, and TPN.

  • Hypercellular

    More than the normal number of cells.

  • Hyperglycemia

    (HY-per-gly-SEE-mee-uh)

    Higher than normal amount of glucose (a type of sugar) in the blood. Hyperglycemia can be a sign of diabetes or other conditions. Also called high blood sugar.