Glossary · Nouns · H
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TermTypeDefinitionClassificationsUpdated
Hyacinth BeannounMWEperennial twining vine of Old World tropics having trifoliate leaves and racemes of fragrant purple pea-like flowers followed by maroon pods of edible seedsverified
Hyaenanoundoglike nocturnal mammal of Africa and southern Asia that feeds chiefly on carrionverified
Hyalinnouna glassy translucent substance that occurs in hyaline cartilage or in certain skin conditionsverified
Hyaline CartilagenounMWEtranslucent cartilage that is common in joints and the respiratory passagesverified
Hyaline Membrane DiseasenounMWEan acute lung disease of the newborn (especially the premature newborn)verified
Hyaloid MembranenounMWEthe transparent membrane enveloping the vitreous humor of the eye and separating it from the retinaverified
Hyaluronic AcidnounMWEa viscous mucopolysaccharide found in the connective tissue space and the synovial fluid of movable joints and the humors of the eyeverified
Hybrid AttacknounMWEA Hybrid Attack builds on the dictionary attack method by adding numerals and symbols to dictionary words.Threat
Hybrid EncryptionnounMWEAn application of cryptography that combines two or more encryption algorithms, particularly a combination of symmetric and asymmetric encryption.Control
Hybrid PetunianounMWEhybrids of Petunia axillaris and Petunia integrifolia: a complex group of petunias having single or double flowers in colors from white to purpleverified
Hybrid Security ControlnounMWEA security control that is implemented in an information system in part as a common control and in part as a system-specific control. See also Common Control and System-Specific Security Control.Control
Hybrid VigornounMWE(genetics) the tendency of a crossbred organism to have qualities superior to those of either parentverified
Hybridisationnoun(genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybridsverified
Hybridizationnoun(genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybridsverified
Hybridizingnoun(genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybridsverified
Hydnocarpus OilnounMWEoil from seeds of trees of the genus Hydnocarpus especially Hydnocarpus wightiana (Hydnocarpus laurifolia)verified
Hydranountrouble that cannot be overcome by a single effort because of its many aspects or its persistent and pervasive qualityverified
Hydrantnouna discharge pipe with a valve and spout at which water may be drawn from the mains of waterworksverified
Hydrarthrosisnouninflammation and swelling of a movable joint because of excess synovial fluidverified
Hydrated Aluminium OxidenounMWEwhite crystalline compound that occurs naturally as the mineral gibbsiteverified
Hydrated Aluminum OxidenounMWEwhite crystalline compound that occurs naturally as the mineral gibbsiteverified
Hydraulic BrakenounMWEbrake system in which a brake pedal moves a piston in the master cylinderverified
Hydraulic Brake CylindernounMWEa cylinder that contains brake fluid that is compressed by a pistonverified
Hydraulic EngineeringnounMWEthe branch of civil engineering dealing with the use and control of water in motionverified
Hydraulic PressnounMWEpress in which a force applied by a piston to a small area is transmitted through water to another piston having a large areaverified
Hydraulic PumpnounMWEa water pump that uses the kinetic energy of flowing water to force a small fraction of that water to a reservoir at a higher levelverified
Hydraulic RamnounMWEa water pump that uses the kinetic energy of flowing water to force a small fraction of that water to a reservoir at a higher levelverified
Hydraulic SystemnounMWEa mechanism operated by the resistance offered or the pressure transmitted when a liquid is forced through a small opening or tubeverified
Hydrazoic AcidnounMWEa colorless explosive liquid that is volatile and poisonous and foul-smellingverified
Hydremianounblood disorder in which there is excess fluid volume compared with the cell volume of the bloodverified
Hydrocelenoundisorder in which serous fluid accumulates in a body sac (especially in the scrotum)verified
Hydrocephalusnounan abnormal condition in which cerebrospinal fluid collects in the ventricles of the brainverified
Hydrocephalynounan abnormal condition in which cerebrospinal fluid collects in the ventricles of the brainverified
Hydrochloridenouna complex consisting of an organic base in association with hydrogen chlorideverified
Hydrochlorofluorocarbonnouna fluorocarbon that is replacing chlorofluorocarbon as a refrigerant and propellant in aerosol cansverified
Hydrochlorothiazidenouna diuretic drug (trade name Microzide, Esidrix, and HydroDIURIL) used in the treatment of hypertensionverified
Hydrocortisonenounan adrenal-cortex hormone (trade names Hydrocortone or Cortef) that is active in carbohydrate and protein metabolismverified
Hydrocrackingnounthe process whereby hydrocarbon molecules of petroleum are broken down into kerosene and gasolene by the addition of hydrogen under high pressure in the presence of a catalystverified
Hydroelectric TurbinenounMWEturbine consisting of a large and efficient version of a water wheel used to drive an electric generatorverified
Hydrofluosilicic AcidnounMWEan unstable poisonous corrosive acid known primarily in the form of its saltsverified
Hydrofoilnouna device consisting of a flat or curved piece, as a metal plate, so that its surface reacts to the water it is passing throughverified
Hydrogennouna nonmetallic univalent element that is normally a colorless, odorless, and highly flammable diatomic gasverified
Hydrogen AzidenounMWEa colorless explosive liquid that is volatile and poisonous and foul-smellingverified
Hydrogen BombnounMWEa nuclear weapon that releases atomic energy by union of light (hydrogen) nuclei at high temperatures to form heliumverified
Hydrogen BondnounMWEa chemical bond consisting of a hydrogen atom between two electronegative atoms (e.g., oxygen or nitrogen) with one side be a covalent bond and the other being an ionic bondverified
Hydrogen CarbonatenounMWEa salt of carbonic acid (containing the anion HCO3) in which one hydrogen atom has been replacedverified
Hydrogen CyanidenounMWEa highly poisonous gas or volatile liquid that smells like bitter almondsverified
Hydrogen FluoridenounMWEa colorless poisonous corrosive liquid made by the action of sulphuric acid on calcium fluorideverified