hyperthermic perfusion(HY-per-THER-mik per-FYOO-zhun) A procedure in which a warmed solution containing anticancer drugs is used to bathe, or is passed through the blood…
hyperthyroidism(HY-per-THY-ROY-dih-zum) Too much thyroid hormone. Symptoms include weight loss, chest pain, cramps, diarrhea, and nervousness.
hypertonicA solution with an osmotic potential greater than that of living cells. Treatment with such solutions leads to the plasmolysis of cells.
hyperuricemia(HY-per-yur-ih-SEE-mee-uh) A buildup of uric acid (a byproduct of metabolism) in the blood. Hyperuricemia is a side effect of some anticancer drugs.
hypervariable regionThe parts of both the heavy and light chains of an antibody molecule that enable it to bind to a specific site on an antigen.
hypervariable segmentA region of a protein that varies considerably between strains or individuals.
hypervascular(HY-per-VAS-kyoo-ler) Having a large number of blood vessels.
Hypervelocity Gun (HVG)A gun that can accelerate projectiles to 5 km per second or more; for example, an electromagnetic or rail gun.
hypervisorA hypervisor, sometimes referred to as a virtualization manager, is a program that allows multiple operating systems which can include different operating…
hypnosisA trance-like state in which a person becomes more aware and focused and is more open to suggestion.
HypnozoiteDormant form of malaria parasites found in liver cells. Hypnozoites occur only with Plasmodium vivax and P. ovale.
HypoblastThe inner cell layer, or endoderm, which develops during the formation of the embryonic germ layers.
HypocenterThe point or focus within the earth which is the center of an earthquake and the origin of its elastic waves.
hypocotylThe portion of an embryo or seedling below the cotyledons . A transitional area between stem and root.
hypofractionated radiation therapy(HY-poh-FRAK-shuh-NAYT-ed RAY-dee-AY-shun THAYR-uh-pee) Radiation therapy that gives larger doses (fractions) of radiation in fewer treatment sessions and…
hypofractionation(HY-poh-FRAK-shuh-NAY-shun) Radiation therapy that gives larger doses (fractions) of radiation in fewer treatment sessions and over a shorter period of…
hypogammaglobulinemia(HY-poh-GAM-uh-GLOB-yoo-lih-NEE-mee-uh) A condition in which the level of immunoglobulins (antibodies) in the blood is low and the risk of infection is…
Hypoglycemia UnawarenessThe lack of ability to recognize warning signs (symptoms) of the sympathetic nervous system (adrenergic) involving weakness, nervousness, sweating, cold…
Hypoglycemic ComaResulting from excessive doses of exogenous (injected) insulin or oral hypoglycemic agents medication.
HypolimneticPertaining to the lower, colder portion of a lake or reservoir which is separated from the upper, warmer portion (epilimnion) by the thermocline.
HypolimnionThe lower, or bottom, layer of a lake or reservoir with essentially uniform colder temperatures.
hypomorphA mutation that reduces, but does not completely abolish gene expression.
HypoparathyroidismIncreased secretion of parathyroid hormone. Symptoms and signs include neuromuscular excitability, cramps, spasm, and generalized tetany, paresthesias…
hypopharyngeal cancer(HY-poh-fuh-RIN-jee-ul KAN-ser) Cancer that forms in tissues of the hypopharynx (the bottom part of the throat).
hypopharynxThe bottom part of the throat. Cancer of the hypopharynx is also known as hypopharyngeal cancer.
hypoplasticDefective and reduced growth or development (e.g. dwarfing and stunting in plants) resulting from an abnormal condition, for example disease or…
hypoploidThe situation in which a particular chromosome or chromosome segment is present in less than the normal number. Opposite: hyperploid.
Hyporheic zoneGround water habitats created by the movement of river water from the active channel to areas to the side and beneath the active channel.
hypospadias(hy-poh-SPAY-dee-us) A birth defect in which the opening of the urethra (the tube through which urine leaves the body) is not in its normal place.
Hypostasisthe pooling of blood as it accumulates at the lowest parts of the body, being pulled down by gravity; is a method of determining the position of the body…
hypothalamic peptidesPeptides generated in the vertebrate forebrain and concerned with regulating the body's physiological state.
hypothalamus(hye-po-THAL-uh-mus) The area of the brain that controls body temperature, hunger, and thirst.
HypothecationHypothecation means pledging an asset as collateral for a loan. If you use a margin account to buy on margin or sell short, for example, you pledge…
Hypothermiathis situation occurs when the core temperature of one's body falls below normal.
HypothesisA tentative proposal made to explain certain observations or facts that requires further investigation to be verified.
hypothetical person skilled in the artThe standard applied under Section 103 of the Patent Statute is whether the invention would have been obvious at the time the invention was made to one…
hypothyroidism(HY-poh-THY-ROY-dih-zum) Too little thyroid hormone. Symptoms include weight gain, constipation, dry skin, and sensitivity to the cold.
hypotonicOsmotic potential less than that of living cells. Cells placed in a hypotonic solution will absorb water and display swelling and turgidity.
hypoxemia(HY-pok-SEE-mee-uh) A condition in which there is not enough oxygen in the blood.
HypoxiaA condition in which there is a decrease in the oxygen supply to a tissue. In cancer treatment, the level of hypoxia in a tumor may help predict the…