ExpertGlossary terms starting with H

1,452 terms

Homicide The killing of one human by another, first-degree is the most serious, involves premeditation.
homing A process in which a mobile station is directed, or directs itself, toward an electromagnetic, thermal, sonic, or other source of energy, whether primary…
Homing All-the- Way Killer (HAWK) (1) Upgrades to the HAWK interceptor and radar system to provide the Marine Corps with a mobile point theater ballistic missile defense capability.
Homing Device A device, mounted on a missile, to aid its guidance to a target. The homing device uses sensors to detect the position of, or to help predict the future…
Homing Guidance A system by which a missile steers itself towards a target by means of a selfcontained mechanism which is activated by some distinguishing characteristics…
Homing Tandem Operating Company The Homing Tandem Operating Company is the company identified in the Telcordia LERG Routing Guide as being the owner of the tandem to which the NXX code…
homoallele One of a number of otherwise identical alleles which differ at the same site in their sequence.
homochronous The relationship between two signals such that their corresponding significant instants are displaced by a constant interval of time.
homodimer A protein comprising two identical polypeptide chains, or a dimer of identical residues.
homoduplex DNA A double-stranded fully complementary DNA molecule.
homoeologous Referring to chromosome s which are descended from a common progenitor, but which have evolved to be no longer fully homologous.
homogametic Producing similar gametes with regard to the sex chromosomes . In mammals, the female is homogametic (XX), and the male is heterogametic (XY).
Homogeneous Looking the same at every location. Homogeneous milk has no lumps or impurities; it remains the same no matter where you look.
homogeneous cladding In an optical fiber, a cladding in which the nominal refractive index is constant throughout.
homogeneous collection A collection of objects with the same dynamic type. Arrays are the most common homogeneous collection objects. See heterogeneous collection.
Homogeneous earthfill dam An embankment dam construction throughout of more or less uniform earth materials, except for possible inclusion of internal drains or blanket drains.
homogeneous multiplexing Multiplexing in which all of the information-bearer channels operate at the same data signaling rate.
Homogeneous Rolled Earth Dam An embankment dam constructed of similar earth material throughout, except for possible inclusion of internal drains or drainage blankets; distinguished…
homogenotization An allele replacement technique, in which a bacterial cell is transformed with a plasmid containing an altered copy of the target sequence, and a double…
homoharringtonine An anticancer drug that belongs to the plant alkaloid family of drugs.
Homojunction The region between an n-layer and a p-layer in a single material, photovoltaic cell.
homokaryon A cell with two or more identical nuclei as a result of fusion. Opposite: heterokaryon.
Homolog In diploid organisms, one member of a pair of matching chromosomes.
Homologous 1. General definition: from the same source, or having the same evolutionary function or structure. 2.
Homologous chromosome Chromosome containing the same linear gene sequences as another, each derived from one parent.
Homologous chromosomes Chromosomes that have the same linear arrangement of genes--a pair of matching chromosomes in a diploid organism. See Chromosomes.
Homologous Flares In solar-terrestrial terms, solar flares that occur repetitively in the same active region, with essentially the same position and with a common pattern…
Homologous recombination The exchange of DNA fragments between two DNA molecules or chromatids of paired chromosomes (during crossing over) at the site of identical nucleotide…
Homology 1. The degree of identity between individuals, or characters. 2. The degree of identity of sequence (nucleotide or amino acid) between a number of DNA or…
homomultimer A protein consisting of a number of identical subunits.
homoplasmy The condition in which all copies of an organelle in a cell are genetically identical. Opposite: heteroplasmy.
homopolymer A polymer (nucleic acid, polypeptide, etc.) which contains only one kind of residue (e.g. the polynucleotide GGGGGGGGG...).
homopolymeric tailing See: tailing.
Homozygote An organism whose genotype is characterized by two identical alleles of a gene. See Allele, Genotype.
homozygous (adj.) See: homozygote.
HOMS Homing Overlay Mission Simulation.
honey hole A slang term describing a specific hole, spot, or area containing big fish or lots of catchable fish.
Honey Pot In our context, it is also known as a “spam trap”. We have thousands of domains which accept all email sent to them, with the express purpose of…
Honeypot A host that is designed to collect data on suspicious activity and has no authorized users other than its administrators.
Honorarium A payment of money or anything of value for an appearance, speech, or article, less any necessary travel expenses.
Hood A projection that shelters an element such as a door or window.
Hook Echo A radar reflectivity pattern characterized by a hook-shaped extension of a thunderstorm echo, usually in the right-rear part of the storm (relative to its…
hop An intermediate stop on the path along which mail is routed when the sender's server and recipient's server are not directly connected.
hop count In a data communications network, the number of legs traversed by a packet between its source and destination.
Hope scholarship credit You may qualify for a Hope scholarship tax credit for money you spend on qualified educational expenses for yourself, your spouse, or a dependent child.
Hopkins spoons A brand name of spoon with a hammered appearance.
Hopper A storage bin or a funnel that is loaded from the top, and discharges through a door or chute in the bottom.
Hopper Barge An open compartment barge used for dry bulk cargo that doesn’t require protection from the weather, such as pipe, scrape, coal, ore, etc.
Horizon The distant line along with the earth and sky appear to meet. Obstructions are not considered as part of the horizon.
horizon angle Of a directional antenna, the angle, in a vertical plane, subtended by the lines extending (a) from the antenna to the radio horizon and (b) from the…
Horizon line The apparent line in the landscape formed by the meeting of the visible land surface and the sky.
Horizontal angle of view The angle of landscape viewed in sharp focus, measured along the horizon, without turning the head. See also Vertical angle of view; Angle of view
Horizontal De-duplication A way to identify documents that are duplicated across multiple custodians or other production data sets. See De-Duplication.
horizontal equity The concept that people in the same income group should be taxed at the same rate. "Equals should be taxed equally."
Horizontal field of view See Horizontal angle of view
Horizontal gene transfer Transmission of DNA between species, involving close contact between the donor's DNA and the recipient, uptake of DNA by the recipient, and stable…
Horizontal Ground Loop In this type of closed-loop geothermal heat pump installation, the fluid-filled plastic heat exchanger pipes are laid out in a plane parallel to the…
horizontal redundancy check Synonym longitudinal redundancy check.
horizontal resolution 1. In facsimile, the number of pixels per unit distance in the direction of scanning or recording. 2.
Horizontal Scaling See Scale Out
horizontal wind The horizontal wind in terms of either speed and direction, or the zonal (u) and meridional (v) components.
Horizontal-Axis Wind Turbines Turbines in which the axis of the rotor's rotation is parallel to the wind stream and the ground.
hormonal therapy (hor-MOH-nul THAYR-uh-pee) Treatment that adds, blocks, or removes hormones. For certain conditions (such as diabetes or menopause), hormones are given to…
hormone (HOR-mone) One of many chemicals made by glands in the body. Hormones circulate in the bloodstream and control the actions of certain cells or organs.
hormone receptor (HOR-mone reh-SEP-ter) A protein on the surface of a cell to which a specific hormone binds. The hormone causes many changes to take place in the cell.
hormone receptor test (HOR-mone reh-SEP-ter test) A test to measure the amount of certain proteins, called hormone receptors, in cancer tissue.
hormone replacement therapy (HOR-mone ree-PLAYS-ment THAYR-uh-pee) Hormones (estrogen, progesterone, or both) given to women after menopause to replace the hormones no longer…
hormone responsive In oncology, describes cancer that responds to hormone treatment.
hormone therapy (HOR-mone THAYR-uh-pee) Treatment that adds, blocks, or removes hormones. For certain conditions (such as diabetes or menopause), hormones are given to…
hormone treatment Treatment that adds, blocks, or removes hormones. For certain conditions (such as diabetes or menopause), hormones are given to adjust low hormone levels.
horn In radio transmission, an open-ended waveguide, of increasing cross-sectional area, which radiates directly in a desired direction or feeds a reflector…
horn gap switch A switch provided with arcing horns, ordinarily used for disconnecting or breaking the charging current of overhead transmission and distribution lines.
Hornblende Black blade-like mineral common in igneous and metamorphic rocks.
Horner syndrome (...SIN-drome) A condition in which one side of the face is flushed, does not produce sweat, and has a constricted pupil and drooping eyelid.
Hornfels Fine-grained, gray-green metamorphic rock produced by "baking" of sedimentary rocks by an igneous intrusion in which sedimentary features may still be…
Horsehead (false set) A temporary support for forepoles used in tunneling soft ground.
Horsepower A measurement of mechanical or engine power. Measured in the amount of power it takes to move 33,000 pounds one foot in a minute,
Horsepower (hp) A unit of rate of operation. Electrical hp: a measure of time rate of mechanical energy output; usually applied to electric motors as the maximum output…
Horsepower Hour (hph) One horsepower provided over one hour; equal to 0.745 kilowatt-hour or 2,545 Btu.
Horst An elongated crustal block that is relatively raised between two parallel normal faults or grabens. See also Half-graben
hospice (HOS-pis) A program that provides special care for people who are near the end of life and for their families, either at home, in freestanding facilities…
Hospice Care Care given to someone expected to live less than six months due to a terminal disease or condition.
Hospice Services Services to provide comfort and support for persons in the last stages of a terminal illness and their families.
Hospital An institution that provides medical, surgical, or psychiatric care and treatment for the sick or the injured.
Hospital Outpatient Care Care in a hospital that usually doesn’t require an overnight stay.
Hospital Readmissions A situation where you were discharged from the hospital and wind up going back in for the same or related care within 30, 60 or 90 days.
Hospitality A general term used in travel & tourism describing the “hospitality industry”; refers to the general greeting, welcoming, food service, etc.
Hospitality Sales and Marketing Association International (HSMAI) www.hsmai.org , www.abt-travel.com
Hospitalization Care in a hospital that requires admission as an inpatient and usually requires an overnight stay.
host In a network, the central computer which controls the remote computers and holds the central databases.
host address A fully qualified domain name (usually alphabetic) identifying the address of one specific host computer on the Internet.
host bus adapter (HBA) Any hardware bridge between a storage interconnect and a system's I/O bus.
host cell A cell that is infected by a virus or another type of microorganism.
host central office An electronic analog or digital base switching unit containing the central call processing functions which service the host office and its remote…
host certificate An EEC belonging to a host. When using GSI this certificate is typically stored in /etc/grid-security/hostcert.pem.
host computer In a computer network, a computer that provides end users with services such as computation and database access and that usually performs network control…
host credentials The combination of a host certificate and its corresponding private key.
Host Credentials Authorization Protocol A protocol used by Access Control Server (ACS) to send and receive statements of health to and from other NAP infrastructure components.
Host Installation A designated DoD facility that provides non peculiar SDS support of SDS elements.
Host Interface The interface between a communications processor and a host computer.