high-level language (HLL)A computer programming language that is primarily designed for, and syntactically oriented to, particular classes of problems and that is essentially…
High-level language virtual machinesIn high-level language virtual machines, the virtualization layer sits as an application program on top of an operating system.
high-pass filterA filter that passes frequencies above a given frequency and attenuates all others.
high-performance equipmentEquipment that (a) has the performance characteristics required for use in trunks or links, (b) is designed primarily for use in global and tactical…
High-pressure gateA gate consisting of a rectangular leaf encased in a body and bonnet and equipped with a hydraulic hoist for moving the gate leaf.
High-Pressure Sodium LampA type of High-Intensity Discharge (HID) lamp that uses sodium under high pressure as the primary light-producing element.
high-priority emergency service callA call identified as receiving emergency service treatment, which has been marked as requiring special treatment by the emergency service administration.
high-risk cancerCancer that is likely to recur (come back), or spread.
High-Risk Insurance PoolA State health insurance program that provides coverage for individuals who are denied coverage due to a pre-existing condition or who have health…
High-risk poolA health plan that provides coverage for individuals with pre-existing health care conditions who cannot purchase it in the private market.
high-selenium Brassica juncea(BRA-sih-kuh JUN-see-uh) Brassica juncea that has been grown in high levels of selenium.
High-Speed StreamIn solar-terrestrial terms, a feature of the solar wind having velocities that are about double average solar wind values.
high-usage trunk groupA group of trunks for which an alternate route has been provided to absorb the relatively high rate of overflow traffic.
High-yield bondHigh-yield bonds are bonds whose ratings from independent rating services are below investment grade.
Higher Authority InterfacePolicy, strategy, doctrine, readiness conditions, and rules of engagement from higher authorities for use by the defense system in conducting system…
Higher heating valueQuantity of heat liberated by the complete combustion of a unit volume or weight of a fuel assuming that the produced water vapor is completely condensed…
Higher Heating Value (HHV)The maximum heating value of a fuel sample, which includes the calorific value of the fuel (bone dry) and the latent heat of vaporization of the water in…
Higher LubricityThe ability to reduce friction—usually in fuel pumps and fuel injectors.
highly active antiretroviral therapy(...AN-tee-REH-troh-VY-rul THAYR-uh-pee) Treatment for human immunodeficiency virus (HIV) infection that uses a combination of several antiretroviral…
Highly compensated employeesHighly compensated employees are people whose on-the-job earnings are higher than the level the government has established to differentiate this category…
Highly conserved sequenceA DNA sequence that is very similar in several different kinds of organisms. Scientists regard these cross species similarities as evidence that a…
Highly discordant land useRefers to development that is at variance with the existing condition of the land. It might also be described as incongruous.
highwayA digital serial-coded bit stream with time slots allotted to each call on a sequential basis. 2.
HijackingMaking a search engine believe that another website exists at your URL. Typically done using techniques such as a 302 redirect or meta refresh.
Hijacking of WebsitesHijacking of websites is a practice that makes search engines believe that a specific website resides at another URL.
HIPAA Eligible IndividualYour status once you have had 18 months of continuous creditable health coverage.
HIPAA Privacy RuleA rule issued by the U.S. Department of Health and Human Services to implement the privacy requirements of the Health Insurance Portability and…
HistocompatibleA tissue or organ from a donor (the person giving the organ or tissue) that will not be rejected by the recipient (the patient in whom the tissue or organ…
histoglobulinThe peptides present on the surface of nucleate cells, responsible for the differences between genetically non-identical individuals that cause rejection…
histologic examination(HIS-tuh-LAH-jik ig-ZA-mih-NAY-shun) The examination of tissue specimens under a microscope.
histology(his-TAH-loh-jee) The study of tissues and cells under a microscope.
histoneA type of protein found in chromosomes. Histones bind to DNA, help give chromosomes their shape, and help control the activity of genes.
histone deacetylaseAn enzyme that changes the way histone binds to DNA. Histone deacetylase inhibitors are being studied as a treatment for cancer. Also called HDAC.
histone deacetylase inhibitor(HIS-tone dee-uh-SET-ih-lase in-HIH-bih-ter) A substance that causes a chemical change that stops tumor cells from dividing.
histopathology(HIS-toh-puh-THAH-loh-jee) The study of diseased cells and tissues using a microscope.
HistoricThe time period after the appearance of written records. In the New World, this generally refers to the time period after the beginning of European…
Historic AppearanceThe visual appearance of a structure or site at a specific point in time after it has undergone alterations or additions which enhance or contribute to…
Historic AreaAn area or building in which historic events occurred, or one which has special value due to architectural or cultural features relating to the heritage…
historic cohort studyA research study in which the medical records of groups of individuals who are alike in many ways but differ by a certain characteristic (for example…
Historic FabricA building's original or significant historic façade construction material or ornament, or fragments thereof.
Historic propertiesAny prehistoric or historic districts, sites, buildings, structures, or objects included in, or eligible for inclusion in, the National Register of…
Historic resourcesMaterial remains and the landscape alterations that have occurred since the arrival of Euro-Americans.
Historic structureA building that is officially recognized for its historic significance and has special status under the 1976 Tax Reform Act which encourages…
Historic windows(1) windows installed at time of construction of the building; or (2) windows of a type installed at time of construction of similar buildings in similar…
historical control subjectAn individual treated in the past and used in a comparison group when researchers analyze the results of a clinical study that had no control group.
historical valuedetermination that records possess value in documenting the history of an organization and are thus worthy of permanent preservation See also…
historical viewIn ArcStorm, a snapshot of the state of a given data source at a given time. In an historical view, the database is not modified, and no data is created…
historyA mechanism in ArcStorm to enable the tracking of changes made to a data source.
history listA record of the documents visited during a Web session, which list allows users to access previously visited pages more quickly or to generate a record of…
HistosolWet organic soils, such as peats and mucks.
hit counterAn indicator on a Web page that graphically displays the number of previous users that have accessed the page.
HITSLink based algorithm which ranks relevancy scores based on citations from topical authorities.
HIVThe cause of acquired immunodeficiency syndrome (AIDS). Also called human immunodeficiency virus.
HIV antibodyA substance produced by certain white blood cells in reaction to contact with the human immunodeficiency virus (HIV).
HIV positive(... PAH-zih-tiv) Infected with the human immunodeficiency virus (HIV), the cause of acquired immunodeficiency syndrome (AIDS).
HIV/AIDS Bureau (HAB)The bureau within the Health Resources and Services Administration (HRSA) of the U.S.
HIV/AIDS Dental Reimbursement ProgramThe program within the HRSA HIV/AIDS Bureau's Division of Community Based Programs that assists with uncompensated costs incurred in providing oral health…
HiveAn open source, data warehouse and analytic package that runs on top of Hadoop.
HLAOne of a group of proteins found on the surface of white blood cells and other cells that play an important part in the body's immune response to foreign…
HLHA rare disorder in which histiocytes and lymphocytes (types of white blood cells) build up in organs including the skin, spleen, and liver, and destroy…
HLR (Home Location Register)The Home Location Register (HLR) is a database for permanent storage of subscriber data and service profiles.
HLRCCA rare inherited disorder that increases the risk of developing benign (noncancerous) tumors of the skin and the uterus (leiomyomas) and malignant…
HMD(Hemispheric Map Discussion)- This discussion is issued once a day around 1 PM EST (2 PM EDT) and is primarily intended to provide insight into the…
HMG-CoA reductase inhibitor(HMG-koh-EN-zime-A ree-DUK-tayz in-HIH-bih-ter) A substance that blocks an enzyme needed by the body to make cholesterol and lowers the amount of…
HMGA1A protein that binds to the DNA and certain proteins in chromosomes. It is involved in many functions in the cell, and helps protect cells from dying.