| hyacinth
|
(noun) a red transparent variety of zircon used as a gemstone |
Synonyms:
jacinth |
|---|
| (noun) any of numerous bulbous perennial herbs |
- |
| hyaena
|
(noun) doglike nocturnal mammal of Africa and southern Asia that feeds chiefly on carrion |
Synonyms:
hyena |
|---|
| hyalin
|
(noun) a glassy translucent substance that occurs in hyaline cartilage or in certain skin conditions |
Synonyms:
hyaline |
|---|
| hyaline
|
(noun) a glassy translucent substance that occurs in hyaline cartilage or in certain skin conditions |
Synonyms:
hyalin |
|---|
| hyalinisation
|
(noun) the state of being hyaline or having become hyaline |
Synonyms:
hyalinization |
|---|
| hyalinization
|
(noun) the state of being hyaline or having become hyaline |
Synonyms:
hyalinisation |
|---|
| hyaloid
|
(noun) the transparent membrane enveloping the vitreous humor of the eye and separating it from the retina |
Synonyms:
hyaloid membrane |
|---|
| hyaloplasm
|
(noun) the clear nongranular portion of the cytoplasm of a cell |
Synonyms:
ground substance |
|---|
| hyaluronidase
|
(noun) an enzyme (trade name Hyazyme) that splits hyaluronic acid and so lowers its viscosity and increases the permeability of connective tissue and the absorption of fluids |
Synonyms:
Hyazyme,
spreading factor |
|---|
| hybrid
|
(noun) a word that is composed of parts from different languages (e.g., `monolingual' has a Greek prefix and a Latin root) |
Synonyms:
loan-blend,
loanblend |
|---|
| (noun) a composite of mixed origin |
- |
| (noun) (genetics) an organism that is the offspring of genetically dissimilar parents or stock; especially offspring produced by breeding plants or animals of different varieties or breeds or species |
Synonyms:
cross,
crossbreed |
| (noun) a car which runs on two power sources, usually an internal combustion engine and an electronic motor |
Synonyms:
hybrid car |
| hybridisation
|
(noun) (genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids |
Synonyms:
crossing,
interbreeding,
hybridization,
hybridizing,
cross,
crossbreeding |
|---|
| hybridization
|
(noun) (genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids |
Synonyms:
crossing,
interbreeding,
hybridisation,
hybridizing,
cross,
crossbreeding |
|---|
| hybridizing
|
(noun) (genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids |
Synonyms:
crossing,
interbreeding,
hybridisation,
hybridization,
cross,
crossbreeding |
|---|
| hybridoma
|
(noun) a hybrid cell resulting from the fusion of a lymphocyte and a tumor cell; used to culture a specific monoclonal antibody |
- |
|---|
| hydantoin
|
(noun) any of a group of anticonvulsant drugs used in treating epilepsy |
- |
|---|
| hydathode
|
(noun) a pore that exudes water on the surface or margin of a leaf of higher plants |
Synonyms:
water pore,
water stoma |
|---|
| hydatid
|
(noun) cyst filled with liquid; forms as a result of infestation by tapeworm larvae (as in echinococcosis) |
- |
|---|
| hydatidosis
|
(noun) infestation with larval echinococci (tapeworms) |
Synonyms:
hydatid disease,
echinococcosis |
|---|
| hydra
|
(noun) trouble that cannot be overcome by a single effort because of its many aspects or its persistent and pervasive quality |
- |
|---|
| (noun) small tubular solitary freshwater hydrozoan polyp |
- |
| hydralazine
|
(noun) an antihypertensive drug (trade name Apresoline) that dilates blood vessels; used (often with a diuretic) to treat hypertension and congestive heart failure |
Synonyms:
Apresoline |
|---|
| hydramnios
|
(noun) an abnormality of pregnancy; accumulation of excess amniotic fluid |
- |
|---|
| hydrangea
|
(noun) any of various deciduous or evergreen shrubs of the genus Hydrangea |
- |
|---|
| hydrant
|
(noun) a faucet for drawing water from a pipe or cask |
Synonyms:
tap,
water faucet,
water tap |
|---|
| (noun) a discharge pipe with a valve and spout at which water may be drawn from the mains of waterworks |
- |
| hydrargyrum
|
(noun) a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures |
Synonyms:
Hg,
mercury,
quicksilver,
atomic number 80 |
|---|
| hydrarthrosis
|
(noun) inflammation and swelling of a movable joint because of excess synovial fluid |
- |
|---|
| hydrate
|
(noun) any compound that contains water of crystallization |
- |
|---|
| hydration
|
(noun) the process of combining with water; usually reversible |
- |
|---|
| hydraulics
|
(noun) study of the mechanics of fluids |
Synonyms:
fluid mechanics |
|---|
| hydrazide
|
(noun) any of a class of organic compounds sharing a common functional group characterized by a nitrogen to nitrogen covalent bond with 4 substituents with at least one of them being an acyl group. |
- |
|---|
| hydrazine
|
(noun) a colorless fuming corrosive liquid; a powerful reducing agent; used chiefly in rocket fuels |
- |
|---|
| hydrazoite
|
(noun) a salt of hydrazoic acid |
- |
|---|
| hydremia
|
(noun) blood disorder in which there is excess fluid volume compared with the cell volume of the blood |
- |
|---|
| hydride
|
(noun) any binary compound formed by the union of hydrogen and other elements |
- |
|---|
| hydrilla
|
(noun) submersed plant with whorled lanceolate leaves and solitary axillary flowers; Old World plant naturalized in southern United States and clogging Florida's waterways |
Synonyms:
Hydrilla verticillata |
|---|
| hydrocarbon
|
(noun) an organic compound containing only carbon and hydrogen |
- |
|---|
| hydrocele
|
(noun) disorder in which serous fluid accumulates in a body sac (especially in the scrotum) |
- |
|---|
| hydrocephalus
|
(noun) an abnormal condition in which cerebrospinal fluid collects in the ventricles of the brain; in infants it can cause abnormally rapid growth of the head and bulging fontanelles and a small face; in adults the symptoms are primarily neurological |
Synonyms:
hydrocephaly |
|---|
| hydrocephaly
|
(noun) an abnormal condition in which cerebrospinal fluid collects in the ventricles of the brain; in infants it can cause abnormally rapid growth of the head and bulging fontanelles and a small face; in adults the symptoms are primarily neurological |
Synonyms:
hydrocephalus |
|---|
| hydrochloride
|
(noun) a complex consisting of an organic base in association with hydrogen chloride |
- |
|---|
| hydrochlorofluorocarbon
|
(noun) a fluorocarbon that is replacing chlorofluorocarbon as a refrigerant and propellant in aerosol cans; considered to be somewhat less destructive to the atmosphere |
Synonyms:
HCFC |
|---|
| hydrochlorothiazide
|
(noun) a diuretic drug (trade name Microzide, Esidrix, and HydroDIURIL) used in the treatment of hypertension |
Synonyms:
HydroDIURIL,
Microzide,
Esidrix |
|---|
| hydrocolloid
|
(noun) a substance that forms a gel with water |
- |
|---|
| hydrocortisone
|
(noun) an adrenal-cortex hormone (trade names Hydrocortone or Cortef) that is active in carbohydrate and protein metabolism |
Synonyms:
Hydrocortone,
Cortef,
cortisol |
|---|
| hydrocracking
|
(noun) the 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 catalyst |
- |
|---|
| hydrodynamics
|
(noun) study of fluids in motion |
Synonyms:
hydrokinetics |
|---|
| hydroelectricity
|
(noun) electricity produced by water power |
- |
|---|
| hydroflumethiazide
|
(noun) diuretic used to treat hypertension and edema |
- |
|---|
| hydrofluorocarbon
|
(noun) a fluorocarbon emitted as a by-product of industrial manufacturing |
Synonyms:
HFC |
|---|
| hydrofoil
|
(noun) a device consisting of a flat or curved piece (as a metal plate) so that its surface reacts to the water it is passing through |
Synonyms:
foil |
|---|
| (noun) a speedboat that is equipped with winglike structures that lift it so that it skims the water at high speeds |
Synonyms:
hydroplane |
| hydrogel
|
(noun) a colloidal gel in which water is the dispersion medium |
- |
|---|
| hydrogen
|
(noun) a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe |
Synonyms:
H,
atomic number 1 |
|---|
| hydrogenation
|
(noun) a chemical process that adds hydrogen atoms to an unsaturated oil |
- |
|---|
| hydrography
|
(noun) the science of the measurement and description and mapping of the surface waters of the earth with special reference to navigation |
- |
|---|
| hydroid
|
(noun) colonial coelenterates having the polyp phase dominant |
Synonyms:
hydrozoan |
|---|
| hydroisohypse
|
(noun) a line on a map connecting points of equal level on the piezometric surface. |
- |
|---|
| hydroisopieze
|
(noun) a line on a map connecting points of identical pressures in the water bearing stratum. |
- |
|---|
| hydrokinetics
|
(noun) study of fluids in motion |
Synonyms:
hydrodynamics |
|---|
| hydrolith
|
(noun) a saltlike binary compound (CaH2) used as a reducing agent and source of hydrogen |
Synonyms:
calcium hydride |
|---|
| hydrologist
|
(noun) a geologist skilled in hydrology |
- |
|---|
| hydrology
|
(noun) the branch of geology that studies water on the earth and in the atmosphere: its distribution and uses and conservation |
- |
|---|
| hydrolysate
|
(noun) a product of hydrolysis |
- |
|---|
| hydrolysis
|
(noun) a chemical reaction in which water reacts with a compound to produce other compounds; involves the splitting of a bond and the addition of the hydrogen cation and the hydroxide anion from the water |
- |
|---|
| hydromancer
|
(noun) one who practices hydromancy |
- |
|---|
| hydromancy
|
(noun) divination by water (as by patterns seen in the ebb and flow of the tides) |
- |
|---|
| hydromel
|
(noun) honey diluted in water; becomes mead when fermented |
- |
|---|
| hydrometer
|
(noun) a measuring instrument for determining the specific gravity of a liquid or solid |
Synonyms:
gravimeter |
|---|
| hydrometry
|
(noun) the measurement of specific gravity |
Synonyms:
gravimetry |
|---|
| hydromorphone
|
(noun) a narcotic analgesic (trade name Dilaudid) used to treat moderate to severe pain |
Synonyms:
hydromorphone hydrochloride,
Dilaudid |
|---|
| hydronephrosis
|
(noun) accumulation of urine in the kidney because of an obstruction in the ureter |
- |
|---|
| hydropathy
|
(noun) the internal and external use of water in the treatment of disease |
Synonyms:
hydrotherapy |
|---|
| hydrophobia
|
(noun) a symptom of rabies in humans consisting of an aversion to swallowing liquids |
- |
|---|
| (noun) a morbid fear of water |
- |
| (noun) an acute viral disease of the nervous system of warm-blooded animals (usually transmitted by the bite of a rabid animal); rabies is fatal if the virus reaches the brain |
Synonyms:
madness,
rabies,
lyssa |
| hydrophobicity
|
(noun) the property of being water-repellent; tending to repel and not absorb water |
- |
|---|
| hydrophyte
|
(noun) a plant that grows partly or wholly in water whether rooted in the mud, as a lotus, or floating without anchorage, as the water hyacinth |
Synonyms:
hydrophytic plant,
water plant,
aquatic plant |
|---|
| hydroplane
|
(noun) an airplane that can land on or take off from water |
Synonyms:
seaplane |
|---|
| (noun) a speedboat that is equipped with winglike structures that lift it so that it skims the water at high speeds |
Synonyms:
hydrofoil |
| hydroponics
|
(noun) a technique of growing plants (without soil) in water containing dissolved nutrients |
Synonyms:
aquiculture,
tank farming |
|---|
| hydrops
|
(noun) swelling from excessive accumulation of watery fluid in cells, tissues, or serous cavities |
Synonyms:
dropsy,
oedema,
edema |
|---|
| hydrosol
|
(noun) a sol (colloid) in which the continuous phase is water. |
- |
|---|
| hydrosphere
|
(noun) the watery layer of the earth's surface; includes water vapor |
- |
|---|
| hydrostaticity
|
(noun) The condition of relating to fluids, especially to the pressure that they exert or transmit. |
- |
|---|
| hydrostatics
|
(noun) study of the mechanical properties of fluids that are not in motion |
- |
|---|
| hydrotherapy
|
(noun) the internal and external use of water in the treatment of disease |
Synonyms:
hydropathy |
|---|
| hydrothorax
|
(noun) accumulation of fluid in the pleural cavity (the space between the lungs and the walls of the chest) often resulting from disease of the heart or kidneys |
- |
|---|
| hydroxide
|
(noun) a compound of an oxide with water |
Synonyms:
hydrated oxide |
|---|
| (noun) a chemical compound containing the hydroxyl group |
- |
| hydroxybenzene
|
(noun) a toxic white soluble crystalline acidic derivative of benzene; used in manufacturing and as a disinfectant and antiseptic; poisonous if taken internally |
Synonyms:
phenol,
phenylic acid,
oxybenzene,
carbolic acid |
|---|
| hydroxychloroquine
|
(noun) anti-inflammatory drug (trade name Plaquenil) used in the treatment of rheumatoid arthritis and malaria and lupus erythematosus |
Synonyms:
Plaquenil |
|---|
| hydroxyl
|
(noun) the monovalent group -OH in such compounds as bases and some acids and alcohols |
Synonyms:
hydroxyl group,
hydroxyl radical |
|---|
| hydroxymethyl
|
(noun) a methyl with hydroxide replacing the hydrogen atoms |
- |
|---|
| hydroxyproline
|
(noun) a crystalline amino acid obtained from gelatin or collagen |
- |
|---|
| hydroxytetracycline
|
(noun) a yellow crystalline antibiotic (trademark Terramycin) obtained from a soil actinomycete; used to treat various bacterial and rickettsial infections |
Synonyms:
oxytetracycline,
oxytetracycline hydrochloride,
Terramycin |
|---|
| hydroxyzine
|
(noun) a drug (trade names Atarax and Vistaril) used as a tranquilizer to treat anxiety and motion sickness |
Synonyms:
hydroxyzine hydrochloride,
Vistaril,
Atarax |
|---|
| hydrozoan
|
(noun) colonial coelenterates having the polyp phase dominant |
Synonyms:
hydroid |
|---|
| hyena
|
(noun) doglike nocturnal mammal of Africa and southern Asia that feeds chiefly on carrion |
Synonyms:
hyaena |
|---|
| hygiene
|
(noun) a condition promoting sanitary practices |
- |
|---|
| (noun) the science concerned with the prevention of illness and maintenance of health |
Synonyms:
hygienics |
| hygienics
|
(noun) the science concerned with the prevention of illness and maintenance of health |
Synonyms:
hygiene |
|---|
| hygienist
|
(noun) a medical specialist in hygiene |
- |
|---|
| hygrodeik
|
(noun) a wet and dry bulb hygrometer |
- |
|---|
| hygrometer
|
(noun) measuring instrument for measuring the relative humidity of the atmosphere |
- |
|---|
| hygrophyte
|
(noun) a plant that grows in a moist habitat |
- |
|---|
| hygroscope
|
(noun) hygrometer that shows variations in the relative humidity of the atmosphere |
- |
|---|
| hymen
|
(noun) a fold of tissue that partly covers the entrance to the vagina of a virgin |
Synonyms:
maidenhead,
virginal membrane |
|---|