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haapalaite(mineralogy) A trigonal-hexagonal scalenohedral bronze red mineral containing hydrogen, iron, magnesium, nickel, oxygen, and sulfur.habilitate(intransitive) To qualify oneself, through a demonstration of ability, to function in a certain capacity or to act within a certain role.habitative(linguistics) Indicating the types of structures, shelters, places of worship, or organization of homes in a community.habituableMisspelling of habitable.haemocoeleOriginal form of haemocoelhaemophoreAlternative form of hemophore.haemoscopeAn instrument for regulating and measuring the thickness of a layer of blood for spectroscopic examination.haggravate(archaic) Pronunciation spelling of aggravate.hagioscope(architecture) A small opening in an interior wall of a church, enabling those in the transept to view the high altar.halfsphere(geometry) hemispherehallachoreAlternative form of halalcore.halloysite(mineralogy) A monoclinic-domatic clay mineral containing aluminum, hydrogen, oxygen, and silicon.haloalkane(organic chemistry) Any alkane in which one or more hydrogen atoms has been replaced by that of a halogenhaloalkene(organic chemistry) Any halogen substituted alkenehaloalkyne(organic chemistry) Any halogen substituted alkyne; a haloacetylenehaloborane(inorganic chemistry) Any halogen substituted boranehaloenzyme(biochemistry) Any enzyme that is activated by a cofactor.halofenateA particular antilipidemic and uricosuric drug.halogenase(biochemistry) Any enzyme that catalyzes a halogenation reactionhalogenate(chemistry, transitive) To treat with, or react with, a halogen or a hydrohalic acid.halogenide(chemistry, rare) Synonym of halide.halogenite(chemistry) An oxyanion containing a halogen in the +3 oxidation state.haloketone(organic chemistry) Any halogenated ketonehalopemideAn antipsychotic drug.halosaline(organic chemistry) A piperidine alkaloid isolated from saxauls of the genus Haloxylon.halosilane(inorganic chemistry) Any halogen substituted silanehalostable(biology) Stable in a saline environment.haloxyline(historical) An explosive compound of sawdust, charcoal, niter, and potassium ferrocyanide, formerly used as a substitute for gunpowder.hamamelose(biochemistry) The monosaccharide 2-C-(hydroxymethyl)-D-ribosehambergite(mineralogy) An orthorhombic-dipyramidal mineral containing beryllium, boron, hydrogen, and oxygen.hambroline(nautical) A three-stranded tarred hemp cord.hamitocone(malacology) An organism or fossil with a hamitoconic shell, or the shell itself.hammerableCapable of being formed or shaped by a hammer.hammerlikeResembling or characteristic of a hammer.hammerwiseIn the manner of a hammer.hamshackle(transitive) To tie (an animal) by a rope binding the head to one of the forelegs.hancockite(mineralogy) A mineral of the epidote group, with lead and strontium replacing some of the calcium.handleableCapable of being handled.handlesome(rare) Typified by, or requiring handling; (by extension) difficult to managehandstroke(bellringing) The pull on the sally that swings the bell through a full circlehangarlikeResembling an aircraft hangar.hangashore(Canada, Newfoundland) A lazy person.hapaiosideA particular steroid glycoside.haplocladeA clade of haplotypeshaploidiseTo cause or to undergo haploidisation.haploidizeAlternative form of haploidise.haplophase(biology) The haploid phase in the life cycle of an organismhaplophyte(genetics) Having the normal number of chromosomes characteristic of the organism's gameteshaplorhine(zoology) Any member of the clade Haplorhini of dry-nosed primates.haploscopeAn optical device that presents a separate image to each eyehaplostele(botany) A type of protostele, in which the core of vascular tissue in the stem is smooth, without lobes or mixing of the tissues.happenableCapable of happening.haptophoreThe stable, non-poisonous element of a toxin that enables it to bind to an antitoxin and become neutralized.haptophyte(microbiology) A kind of unicellular marine phytoplankton, typically covered in tiny scales or plates composed of carbohydrates and calcium depositsharassableCapable of, or suited to, being harassed.harasshole(slang, derogatory, Canada, US) An objectionable harassing person.harborsideAn area (especially a residential area) near a harbor (often in the form of converted warehouses etc)harborsomeAlternative form of harboursome.harbourage(British) Alternative form of harborage.hardenableCapable of being hardened.haremesqueResembling or characteristic of a harem.harimanage(sumo) A kimarite in which the attacker, at the edge of the dohyo, reaches over his opponent's shoulder, grabs his mawashi from behind, then pulls and twists him past his own body.harquebuseAlternative form of harquebus.harquebuzeObsolete form of arquebus.harstigite(mineralogy) An orthorhombic-dipyramidal mineral containing beryllium, calcium, hydrogen, manganese, oxygen, and silicon.hasslefree(informal) trouble-freehasslesomeCharacterised by hassle, or marked by hasslinghatiquette(humorous, rare) The etiquette attached to the wearing of hats.haycockite(mineralogy) An orthorhombic-disphenoidal mineral containing copper, iron, and sulfur.hazardableLiable to chance or hazard; exposed to dangers; risky or uncertain.headcheeseAlternative spelling of head cheese.headlineseThe jargon used in headlines of newspapers, often with unconventional grammar driven mainly by extreme brevity as a constraint of the medium.headstripeA stripe of colored feathers on the head of a bird.headstrokeA horizontal line at the top of a letter such as F or T.healthcareAlternative spelling of health care.healthsome(archaic) Conducive to good health.healthwiseWith regard to healthhearselikeResembling or characteristic of a hearse.heartbroke(dialect or nonstandard) heartbrokenhearthlikeResembling or characteristic of a hearth.hearthsideThe area around the fireplace in the living-room of a family house.heartquake(figurative) Trembling of the heart or emotions; trepidation; fear.heartscapeA notional landscape of the human heart or emotions.heartseaseA common European wild flower, Viola tricolor; the wild pansy.heartwhole(now rare) Undismayed, not abashed or frightened; healthy.heatheniseAlternative form of heathenize.heathenize(transitive) To render heathen; to convert to heathenism.heatlabileAlternative form of heat labile.heatstableAlternative form of heat stable.heatstrokeAlternative spelling of heat stroke.heavenlikeResembling or characteristic of a heaven; heavenly.hebephreneOne suffering from hebephrenia.hectareageAlternative form of hectarage.hectolitreA unit of volume or capacity equivalent to 100 litres. Symbol: hLhectometre(metrology) An SI unit of length equal to 100 metres. Symbol: hmhectostereAn old measure of volume equal to one hundred cubic metres.hedgeappleThe fruit of the Osage orange tree (Maclura pomifera), also known as the hedge tree.heelstrikeThe action of the heel striking the ground when walking or running.hegemoniseAlternative spelling of hegemonize.hegemonize(transitive) To subject to hegemony.heidornite(mineralogy) A colorless monoclinic-prismatic mineral with the chemical formula Na₂Ca₃B₅O₈(SO₄)₂Cl(OH)₂.heiferetteA female bovine, usually more than six months of age and less than two years of age, that has had no more than one calf.heightwiseIn terms of height; vertical.hejtmanite(mineralogy) A monoclinic-prismatic mineral containing barium, fluorine, hydrogen, iron, manganese, oxygen, silicon, and titanium.helborsideA particular steroid glycoside.helgramiteAlternative spelling of hellgrammite.helichryseAn unidentified plant with yellow flowers, anciently used in garlands.helicidine(medicine) An antitussive consisting of an extract from the mucus of the snail Helix pomatiahelicoconeA conelike spiral tube that is the form of most mollusc shells.helimerase(biochemistry) An enzyme that functions both as a helicase and a DNA polymeraseheliopause(astronomy) The boundary of heliosphere where the Sun's solar wind is stopped by the interstellar medium.heliophileAny organism that is attracted to sunlight or thrives in it.heliophobeAny organism that dislikes, or cannot thrive in, sunlight.heliophyte(botany) Any plant that thrives in bright sunlighthelioscope(astronomy) An apparatus for viewing the Sun without harming the eye, by means of an optical filter that attenuates most of the sunlight while allowing only a small amount of the solar radiation.heliothineAny moth of the subfamily Heliothinaeheliotrine(organic chemistry) The alkaloid [(7S,8R)-7-hydroxy-5,6,7,8-tetrahydro-3H-pyrrolizin-1-yl]methyl (2S)-2-hydroxy-2-[(1R)-1-methoxyethyl]-3-methylbutanoate present in the heliotrope Heliotropium europaeumheliotrope(uncountable) The fragrance of Heliotropium arborescens flowers, or a scent resembling this fragrance.helipyrone(organic chemistry) The dimeric lactone 6-ethyl-3-[(6-ethyl-4-hydroxy-5-methyl-2-oxopyran-3-yl)methyl]-4-hydroxy-5-methylpyran-2-one present in several herbs and spicesheliumlike(physics) Having the electronic structure of a helium atomhellandite(mineralogy) A monoclinic borosilicate mineral containing rare earths, aluminium and calcium.hellyerite(mineralogy) A monoclinic-prismatic light blue mineral containing carbon, hydrogen, nickel, and oxygen.helmetlikeResembling a helmet.helpelesseObsolete spelling of helpless.hematocele(pathology) A swelling caused by the collection of blood in a cavity, especially of the membrane covering a testicle.hematocyte(hematology, cytology) Any blood cell produced by hematopoiesis, but especially a red blood cellhematogoneA form of lymphocyte, in normal bone marrow, that resembles a leukemic lymphoblasthematolite(mineralogy) A trigonal-pyramidal mineral containing aluminum, arsenic, hydrogen, magnesium, manganese, and oxygen.hematosideA ganglioside present in hemocyteshemerosideA particular steroid glycoside.hemichrome(biochemistry) A denatured form of methemoglobinhemicircleSynonym of semicircle (“half of a circle”).hemiditone(music, Ancient Greece) The lesser third.hemigenome(genetics) The partial genome inherited from either parenthemilabile(chemistry, of a ligand) Partially labilehemipenileOf or relating to a hemipenishemisphere(astronomy, astrology) Half of the celestial sphere, as divided by either the ecliptic or the celestial equator .hemizygote(biology) A hemizygous individualhemochrome(organic chemistry) Any of several iron–porphyrin complexes having one or two basic ligands (normally amines).hemoenzyme(biochemistry) Any of a group of enzymes that control the chemistry of hemehemolysateThe product of hemolysis.hemorrhageA heavy release of blood within or from the body.heparanase(biochemistry) Any enzyme that catalyses the hydrolysis of heparan sulfate into oligosaccharidesheparinase(biochemistry) Any enzyme that catalyses the hydrolytic cleavage of heparinsheparinateA salt of heparin (typically with a metal such as calcium)hepariniseAlternative form of heparinize.heparinize(medicine, transitive) To treat with heparin, especially so as to prevent coagulation.hepatocele(dated, medicine) hernia of the liverhepatocyteAny of the cells in the liver responsible for the metabolism of protein, carbohydrate and lipid and for detoxification.hepatokine(biochemistry) Any of several cytokines found in the liverheptadiene(organic chemistry) Any unsaturated aliphatic hydrocarbon that has seven carbon atoms and two double bondsheptanoate(chemistry) Any salt or ester of heptanoic acid.heptaoxideAlternative form of heptoxide.heptaphane(organic chemistry) In the nomenclature of complex organic compounds, any linear phane containing seven nodes (or superatoms)heptastyle(architecture, of a Classical temple or other structure) having seven columnsheptenoate(organic chemistry) Any salt or ester of a heptenoic acidherebefore(temporal, archaic) Before now.hereticate(transitive) To denounce as heresy or a heretic.hereticideThe killing of a heretic.hereticize(transitive) To make heretic; to cause to be treated as a heresy.heretofore(formal, temporal) Before now, until now, up to the present time; from the beginning to this point.hericenone(organic chemistry) Any of various isolates of Hericium erinaceum that promote nerve growth factor synthesis in vitro.heriotableSubject to the payment of a heriot.hermitlikeResembling or characteristic of a hermit.heroinlikeResembling heroin or some aspect of it.heroinware(video games, slang) An addictive computer game, especially one played to the extent it interferes with the everyday life of the player.herpolhode(mathematics) The surface created by the rotation of a rigid bodyhesitativeDistinguished by hesitation; hesitating.hesperiineAny skipper (butterfly) of the tribe HesperiiniheterocyteAlternative form of heterocyst.heterodyneOf two oscillations: having two slightly different frequencies such that, when combined, they produce a beatheterogene(obsolete) heterogenousheterolyzeTo cause or to undergo heterolysis.heteromaleA man who is heterosexual.heteroside(biochemistry) A glycoside containing two different carbohydrate moietiesheterosite(mineralogy) An orthorhombic-dipyramidal mineral containing iron, oxygen, and phosphorus.heterosome(genetics) sex chromosomeheteroziteAlternative form of heterosite.heulandite(mineralogy) A common mineral of the zeolite group with monoclinic crystals, the most usual form being heulandite-Ca (Ca,Na)₂₋₃Al₃(Al,Si)₂Si₁₃O₃₆·12H₂O.heuweltjie(South Africa) A kind of large mound, of disputed origin, above or near the surface of the landscape in parts of South Africa.hexaboride(inorganic chemistry) Any boride that has six boron atoms per molecule, or per unit cell, e.g. LaB₆.hexacosane(organic chemistry) Any of very many isomers of the aliphatic hydrocarbon having 26 carbon atoms, but especially n-hexacosane CH₃(CH₂)₂₄CH₃hexacosene(organic chemistry) Any unsaturated aliphatic hydrocarbon that has twenty-six carbon atoms and one double bond, but especially 1-hexacosene or 9-hexacosenehexadecane(organic chemistry) Any of the very many isomeric aliphatic hydrocarbons of general formula C₁₆H₃₄hexadecene(organic chemistry) Any of several isomeric alkenes having sixteen carbon atoms and one double bondhexadecile(statistics) Any of the quantiles which divide an ordered sample population into sixteen equally numerous subsets; a subset thus obtained.hexadecyne(organic chemistry) Any aliphatic acetylene that has sixteen carbon atomshexagonite(mineralogy) Synonym of tremolite.hexagrammeRare spelling of hexagram.hexaketide(organic chemistry) A polyketide that has six ketide unitshexameriseAlternative form of hexamerize.hexamerize(chemistry) To form a hexamerhexamidineA particular kind of antiseptic/disinfectant.hexaoleate(organic chemistry) Any compound that has six oleate groups or ionshexathiane(inorganic chemistry) The allotrope of sulfur (S₆) composed of a ring of six atomshexathione(organic chemistry) A chemical compound with six thione (=S) groups.hexatriene(organic chemistry) Any of several isomeric, aliphatic trienes derived from a hexane.hexatrione(medicine) A particular glucocorticoid hormonehexazinoneA nonselective broad-spectrum herbicide, 3-cyclohexyl-6-dimethylamino-1-methyl-1,3,5-triazine-2,4-dione, of the triazine class, used to control grasses and broadleaf and woody plants.hexetidineAn antibacterial, antifungal agent that is often used in veterinary and human medicine as a local anesthetic, astringent, deodorant, and has antiplaque effects.hexokinase(biochemistry) Any enzyme that catalyses the phosphorylation of a hexosehexosamine(biochemistry) Any amino sugar derived from a hexose.hexpartiteAlternative form of hexapartite.hexuronate(organic chemistry) Any salt or ester of a hexuronic acidhexylamine(organic chemistry) Any of many isomeric amines derived from hexane, but especially the primary amine CH₃(CH₂)₅NH₂hexylcaine(pharmacology) A particular kind of short-acting local anesthetic.hibbingite(mineralogy) An orthorhombic-dipyramidal mineral containing chlorine, hydrogen, iron, magnesium, and oxygen.hibernacleA winter retreat; winter quarters.hiccuplikeResembling or characteristic of a hiccup.hickoryite(US, rare, colloquial) Jasper of the color of hickory bark.hidalgoite(mineralogy) A trigonal-hexagonal scalenohedral mineral containing aluminum, arsenic, hydrogen, lead, oxygen, and sulfur.higenamine(organic chemistry) An organic compound found in a variety of plants and used in food supplements developed for weight management.hijackableCapable of being hijacked.hijackware(computing) Malicious software that commandeers other software, especially a web browser, so as to affect its behaviour.hilgardite(mineralogy) A vitreous mixed borate and chloride mineral of calcium.himanimide(organic chemistry) Any of a class of compounds, isolated from the tube worm Serpula himantoides, some of which are fungicidalhimpathize(feminism, rare) To exhibit himpathy; to inappropriately sympathize with men or boys, especially ones guilty of sexual transgressions.hinderableAble to be hindered.hinderanceArchaic spelling of hindrance.hindersomeCausing hindrance or setback; impeding; contrary; adverse; problematic.hindraunceObsolete form of hindrance.hinnerdale(chiefly Pennsylvania Dutch English, informal) Hindquarters, butt.hinsdalite(mineralogy) A trigonal-hexagonal scalenohedral mineral containing aluminum, hydrogen, lead, oxygen, phosphorus, strontium, and sulfur.hippielikeResembling or characteristic of a hippie.hippodromeA horse racing course.hippophageSomeone who eats horsemeathippophileA person who loves horses.hippophobeOne who fears or dislikes horses.histiocyte(biology) a macrophage, derived from bone marrow, found in connective tissuehistoknifeA small, very sharp knife designed for the sectioning of biological specimenshistoscoreAny of several histological scores.hithersideThe nearer side; this side.hobbitlikeResembling or befitting a hobbit.hobbleropeA rope that ties the legs together, hobbling the person or animal that is so tied up.hobblesomeCharacterised or marked by hobblinghobbyhorseAlternative spelling of hobby horse.hockeylikeResembling the game of hockey or some aspect of it.hodgepodgeA collection containing a variety of miscellaneous things.hoernesiteAlternative form of hörnesite.hohmannite(mineralogy) A triclinic-pinacoidal mineral containing hydrogen, iron, oxygen, and sulfur.holarosineA particular steroid glycoside.holfertite(mineralogy) A trigonal-pyramidal mineral containing calcium, hydrogen, iron, oxygen, potassium, titanium, and uranium.hollandite(mineralogy) A monoclinic-prismatic white mineral containing aluminum, barium, iron, lead, manganese, oxygen, silicon, and sodium.hollowwareHollow articles of ironware, such as pots and kettles.holoenzyme(biochemistry) A haloenzyme.hologenome(genetics) The collective genome of a holobionthologrammeRare spelling of hologram.holophrase(linguistics) A single word used to convey a complex idea.homageableSubject to homage.homeologue(genetics) A homeologous gene or chromosomehomeophoneAlternative spelling of homoiophone.homoallele(genetics) Any of several alternative forms of a particular genehomoeotypeAlternative form of homeotype.homogenateAny material obtained by homogenizationhomogeniseTo make homogeneous, to blend or puree.homogenizeTo make or treat as homogeneous or uniform.homoimmune(immunology) Exhibiting homoimmunityhomologate(transitive) To confirm, ratify or approve, especially officially or legally.homologiseAlternative form of homologize.homologize(transitive) To make something homologous.homolosine(cartography) Being or employing a particular pseudocylindrical, equal-area, composite projection used for world maps.homolysate(biology) A lysate produced by homolysishomopurine(genetics) Describing a pairing of a purine with the same one on a neighboring strand of nucleic acidhomosalate(pharmacology) A particular kind of organic compound ester made from salicylic acid that is used in some sunscreens.homoserine(biochemistry) The amino acid 2-amino-4-hydroxybutanoic acid that is an intermediate in the biosynthesis of methionine, threonine and isoleucinehomosphereThe lower part of the atmosphere, up to about 60 miles or 100 km, in which there is no great change in its composition.homozygote(genetics) A diploid individual that has equal alleles at one or more genetic loci.honeyfugleAlternative form of honeyfuggle.honeyguideAny of several brood-parasitic Old World tropical birds, of the family Indicatoridae, that primarily feed on wax, especially beeswax.honeystoneThe mineral mellite.honfidence(4chan /lgbt/ slang, derogatory) The apparently irrational confidence possessed by hons (non-passing trans women) in their appearance.hongshiite(mineralogy) A trigonal-hexagonal scalenohedral mineral containing copper and platinum.honourable(British spelling) Standard spelling of honorable.hoodlumize(transitive) To make into a hoodlum.hooveretteAlternative letter-case form of Hooverette.hoplophileOne who loves or is attracted to firearms or other weapons.hoplophobe(derogatory, rare) Someone who has an irrational fear of guns.hornblende(mineralogy) A green to black amphibole mineral, of complex structure, formed in the late stages of cooling in igneous rock.hornetlikeResembling or characteristic of a hornet.horosphereAn n-1-dimensional hyperplane in hyperbolic n-dimensional space: it is (in the Poincaré disk) Euclidean-tangent at infinity to the boundary sphere or (in the upper-half-space model) Euclidean-parallel to the boundary hyperplane.horridsome(rare) Characteristically or typically horrid; horrendoushorrorcore(music) A subgenre of hip-hop music with horror-themed lyrics and imagery.horrorsomeCharacterised or marked by horror.horrorzineA magazine that publishes horror stories.horseappleThe large, wrinkled, inedible fruit of the American tree Maclura pomifera.horseshite(UK, Ireland) Alternative form of horseshit.horsetrade(idiomatic) To negotiate informally, especially when bargaining or reciprocal concessions are included, frequently regarding politics.horsfiline(organic chemistry) An oxindole alkaloid found in the plant Horsfieldia superba.hospitablecordial and generous towards guestshostryinge(obsolete) A hostel or lodgings of temporary nature; entertainment.houpelandeAlternative form of houppelande.housebrokesimple past of housebreakhousephoneAn internal telephone, connected to a switchboard in the same building.housepridepride in the upkeep of one's home; the quality of being house-proudhouseshareAn arrangement in which two or more people share a house.houseslaveAlternative form of house slave.hoverbargeA barge that uses hovercraft technology, suitable for transporting goods over swampy surfaces.hovercycle(science fiction) A bicycle capable of levitation.huauzontleA flowering plant of the goosefoot family, Chenopodium berlandieri, consumed primarily for its edible inflorescence.huckleboneAlternative form of huckle bone.huddlesomeCharacteristic of a huddle or huddlinghuebneriteAlternative spelling of hübnerite.humanesqueResembling or depicting a human.humanicideThe destruction of the human race.humanphobeSomeone prejudiced, bigoted against humans.humblesome(rare) Characterised or marked by humbleness.humbugableAlternative form of humbuggable.humilitude(rare, obsolete) Humility.humoresque(music) A composition that is playful in attitude and tone.humoursome(archaic) Liable to humours or moods; fickle; ill-tempered.hunchunite(mineralogy) An isometric-hexoctahedral mineral containing gold, lead, and silver.hungersomeCharacterised or marked by hungerhungrisome(UK dialectal, Scotland) Having a keen appetite, hungry.hunterlikeResembling or characteristic of a hunter.hurdlesome(literal, figurative) Fraught by hurdles, obstacles, or impediments; hindersome.hureaulite(mineralogy) A manganese phosphate mineral occurring in granite pegmatites.hurlbutite(mineralogy) A monoclinic-prismatic mineral containing beryllium, calcium, oxygen, and phosphorus.hurriquake(neologism) An incidence of a hurricane and an earthquake occurring in quick succession.husbandage(historical, nautical) The commission or compensation allowed to a ship's manager (formerly named a husband).hyalophane(mineralogy) A monoclinic crystalline mineral, a barium-rich potassium feldspar.hybernacleObsolete form of hibernacle.hybridlikeResembling a hybridhycanthoneA particular schistosomicide, a metabolite of lucanthone.hydragogue(archaic, medicine) Causing a discharge of water; expelling serum effused into any part of the body, as in dropsy.hydrargireObsolete form of hydrargyrum.hydrargyreObsolete form of hydrargyrum.hydrastine(organic chemistry) A natural alkaloid present in goldenseal.hydratableCapable of being hydrated.hydrauconeA form of draft tube used with a hydroturbine, having a bell-mouth shape and a flat plate deflector near the mouth.hydrazoate(obsolete) azidehydriodate(obsolete, inorganic chemistry) iodidehydriodide(chemistry) A compound of hydriodic acid with a base.hydrochoreA plant whose spores, seeds, or fruits are dispersed by water.hydrocloneAn industrial device that uses a conical vortex and centrifugal force to separate a solid-liquid mixture.hydrocoele(chiefly British, hypercorrect) Alternative spelling of hydrocele.hydrocycleA small watercraft powered by pedals.hydrodrome(nautical, obsolete) Synonym of hydrofoil (“boat using hydrofoils”).hydrometre(nonstandard) Alternative form of hydrometer.hydronette(archaic) A syringe.hydrophane(mineralogy) A semitranslucent variety of opal that becomes translucent or transparent on immersion in water.hydrophile(chemistry) Any hydrophilic substance.hydrophobe(chemistry) A hydrophobic compound or material.hydrophonea transducer that converts underwater sound waves into electrical signals, rather like a microphonehydrophore(zoology) A cup-like projection that terminates the pedicels of some hydroids.hydrophyte(botany) A plant that lives in or requires an abundance of water, usually excluding seaweed.hydroplaneTo skim the surface of a body of water while moving at high speed.hydroprene(organic chemistry) The ethyl ester of an isoprene carboxylic acid ethyl (2E,4E)-3,7,11-trimethyl-2,4-dodecadienoate; it has insecticidal propertieshydroscopeA device for viewing objects below the surface of the water.hydrospaceThat part of the Earth, or other planet, that lies below the surface of its lakes, seas and oceans,hydrospireA flattened calcareous tube on each side of the midline of the inner part of the ambulacra of a blastoidhydrotrope(chemistry) A compound that solubilizes hydrophobic compounds in aqueous solutions.hyellazole(biochemistry) A particular carbazole alkaloid.hygrometre(nonstandard and now obsolete) Alternative form of hygrometer.hygrophyte(biology) Any plant that thrives on very wet but not submerged ground.hygroscopeAn instrument that indicates changes in atmospheric humidityhylobatineOf or relating to gibbons.hymenachneAny wetland grass of the genus Hymenachnehypaconine(organic chemistry) A diterpenoid alkaloid present in some aconiteshypatocyteMisspelling of hepatocyte.hyperacute(medicine) Very acute.hyperawareExtremely aware; much more alert to stimuli than normal.hyperbolaeplural of hyperbolahypercycle(hyperbolic geometry) A curve whose points have the same orthogonal distance from a given straight line.hyperdense(medicine) Extremely dense.hyperdrive(science fiction) A spaceship engine that allows faster-than-light travel by entering hyperspace.hyperflare(astronomy, very rare) An extraordinarily powerful, massive flare, usually produced by a magnetar.hyperlapse(photography) A form of time-lapse photography where the camera is gradually moved across a long distance, such as down a highway, and a frame is captured at each new position.hyperobeseExtremely obese.hyperoside(organic chemistry) The flavonoid 3-O-galactoside of quercetin present in some Hypericum plantshyperoxide(inorganic chemistry) Any oxide that has a higher than normal ratio of oxygen to metalhyperplane(geometry) An n-dimensional generalization of a plane; an affine subspace of dimension n − 1 that splits an n-dimensional space. (In a one-dimensional space, it is a point; in two-dimensional space it is a line; in three-dimensional space, it is an ordinary plane.)hyperscale(computing) Able to scale appropriately as increased demand is added to the system.hyperslice(computing, programming) A set of concerns in aspect-oriented programming.hyperspace(mathematics) An n-dimensional Euclidian space with n > 3.hyperstoreA hypermarket.hypertenseExtremely tense.hypervalue(countable) A value more important or beyond an ordinary value.hyperwhiteVery much white or Caucasian; following the stereotypes of the white race to the exclusion of others.hyphaelike(mycology) Resembling hyphae.hypnodommeA dominatrix who uses hypnosis.hypnoscope(dated) An instrument intended to determine a person's susceptibility to hypnotic influences.hypnosporeSynonym of resting spore.hypnotiseeOne who is hypnotised.hypnotizeeA person who is being hypnotized or in a state of hypnosis.hypnozoiteA dormant stage in the life cycle of some species of the malaria parasite Plasmodium (mainly) in the liver. It is formed directly (no multiplication takes place) from a sporozoite injected by the mosquito. However, not all of these inoculated sporozoites form hypnozoites. The reason(s) why some do and others don't is unknown.hypoactiveLess than normally active.hypoborate(inorganic chemistry) The oxyanion of boron B₂O₄⁴⁻ or any salt containing this anionhypocentre(geology) The focus of an earthquake, directly under the epicentre.hypocrisieObsolete form of hypocrisy.hypohalineSynonym of hyposaline.hypohalite(chemistry) any salt of a hypohalous acid, having a general formula M(OX)ₙhypoimmune(immunology) Less than normally immunehypoiodite(chemistry) any salt or ester of hypoiodous acid; they have fungicidal propertieshypomatureNot completely mature; immaturehypomobileLess mobile than normal.hypomotileLess than usually motilehyposalineHaving an abnormally low salinity.hypospheneA process on the neural arch of the vertebrae of some extinct reptileshyposphere(zoology) The lower part of a trochophore.hypostableLess than normally stablehypotenuse(geometry) The side of a right triangle opposite the right angle.hypotonizeTo make hypotonichypusinate(biochemistry) To react with hypusinehystricineLike or pertaining to porcupines.