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Слова на букву hemi-inso (2629)

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hyalomere
The clear periphery of a blood platelet. [hyalo- + G. meros, part]
Hyalomma
An Old World genus (about 21 species) of large ixodid ticks with submarginal eyes, coalesced festoons, an ornate scutum, and a long rostrum. Adults parasitize all domestic ...
hyalophagia, hyalophagy
The eating or chewing of glass. [hyalo- + G. phago, to eat]
hyalophobia
Morbid fear of glass objects. SYN: crystallophobia. [hyalo- + G. phobos, fear]
hyaloplasm, hyaloplasma
The protoplasmic fluid substance of a cell. [hyalo- + G. plasma, thing formed] - nuclear h. SYN: karyolymph.
hyaloserositis
Inflammation of a serous membrane with a fibrinous exudate that eventually becomes hyalinized, resulting in a relatively thick, dense, opaque, glistening, white or gray-white ...
hyalosis
Degenerative changes in the vitreous body. [hyalo- + G. -osis, condition] - asteroid h. numerous small spherical bodies (“snowball” opacities) in the corpus vitreum, ...
hyalosome
An oval or round structure within a cell nucleus that stains faintly but otherwise resembles a nucleolus. [hyalo- + G. soma, body]
hyalurate
SYN: hyaluronate.
hyaluronate
A salt or ester of hyaluronic acid. SYN: hyalurate. - h. lyase a lyase that catalyzes the cleavage of hyaluronic acid s, producing a number of ...
hyaluronic acid
A mucopolysaccharide made up of alternating β1,4-linked residues of hyalobiuronic acid, forming a gelatinous material in the tissue spaces and acting as a lubricant and shock ...
hyaluronic lyase
SYN: hyaluronate lyase.
hyaluronidase
1. Term used loosely for hyaluronate lyase, hyaluronoglucosaminidase, and hyaluronoglucuronidase, one or more of which are present in testis, sperm, other organs, bee and ...
hyaluronoglucosaminidase
An enzyme hydrolyzing β1,4 linkages in hyaluronates. SEE ALSO: hyaluronidase (1), hyaluronate lyase.
hyaluronoglucuronidase
An enzyme hydrolyzing β1,3 linkages in hyaluronates. SEE ALSO: hyaluronidase (1).
hybaroxia
Oxygen therapy with pressures greater than 1 atmosphere or ambient oxygen pressure applied to the entire body in a chamber or room. [G. hyper, above, + baros, pressure, + oxys, ...
hybenzate
USAN-approved contraction for o-(4-hydroxybenzoyl)benzoate.
Hybrid
The word "hybrid" has a number of different biomedical meanings. In transmission genetics, a hybrid is the result of a cross between two genetically dissimilar parents. The ...
hybridism
The state of being hybrid.
hybridization
1. The process of breeding a hybrid. 2. Crossing over between related but nonallelic genes. 3. The specific reassociation of complementary strands of polynucleic acids; e.g., ...
Hybridization, fluorescent in situ
An important molecular cytogenetic method for identifying chromosomes and parts of chromosomes, deciphering chromosome rearrangements, and locating genes on chromosomes. " ...
Hybridization, in situ
The use of a DNA or RNA probe to detect the complementary sequence. In situ hybridization is like all nucleic acid hybridization in being a technique in which single-stranded ...
Hybridization, nucleic acid
A laboratory technique in which single-stranded nucleic acids (DNA or RNA) are allowed to interact so that complexes called hybrids are formed by molecules with similar, ...
Hybridoma
A cell hybrid resulting from the fusion of a cancer cell and a normal lymphocyte (a type of white blood cell). The hybridoma is immortal in the laboratory and makes the same ...
hyclate
USAN-approved contraction for monohydrochloride hemiethanolate hemihydrate, HCl 12C2H5OH 12H2O.
hydantoin
2,4-Imidazolidinedione; derived from urea or from allantoin; the NH–CH2–CO group is prototypical of α-amino acid s. H. derivatives are formed by the reaction of ...
hydantoinate
A salt of hydantoin.
hydatid
1. SYN: h. cyst. 2. A vesicular structure resembling an Echinococcus cyst. [G. hydatis, a drop of water, a hyatid] - Morgagni h. SYN: vesicular appendages of epoophoron, ...
Hydatid disease, alveolar (AHD)
A parasitic disease caused by the larval stage of a microscopic tapeworm Echinococcus multilocularis. AHD is found worldwide, mostly in northern latitudes. in central Europe, ...
hydatidiform
Having the form or appearance of a hydatid.
Hydatidiform mole
A tumor that forms in the uterus as a mass of cysts resembling a bunch of grapes. Moles occur during the childbearing years. They do not spread outside of the uterus. However, a ...
hydatidocele
A cystic mass composed of one or more hydatids formed in the scrotum. [ hydatid + G. kele, tumor]
hydatidosis
The morbid state caused by the presence of hydatid cysts.
hydatidostomy
Surgical evacuation of a hydatid cyst. [ hydatid + G. stoma, mouth]
Hydatigera taeniaeformis
SYN: Taenia taeniaeformis.
hydatoid
1. The aqueous humor. 2. The hyaloid membrane. 3. Relating to the aqueous humor. 4. Watery or resembling water. [G. hydor (hydat-), water, + eidos, resemblance]
hydnocarpus oil
SYN: chaulmoogra oil.
hydr-
See hydro-.
hydracetin
Pure form of acetylphenylhydrazine.
hydradenitis
SYN: hidradenitis.
hydradenoma
SYN: hidradenoma.
hydragogue
Producing a discharge of watery fluid; denoting a class of cathartics that retain fluids in the intestine and aid in the removal of edematous fluids, e.g., saline cathartics. [ ...
hydralazine hydrochloride
A vasodilating antihypertensive agent.
hydrallostane
11β,17α,21-Trihydroxy-5β-pregnane-3,20-dione; a metabolite of cortisole, reduced at the 4,5 double bond. SYN: 4,5α-dihydrocortisol.
hydramitrazine tartrate
An intestinal antispasmodic.
hydramnios, hydramnion
Presence of an excessive amount of amniotic fluid, usually over 2,000 mL. SYN: polyhydramnios. [G. hydor, water, + amnion]
Hydranencephaly
A condition in which the cerebral hemispheres of the brain are absent and replaced by sacs filled with cerebrospinal fluid. Usually the cerebellum and brainstem are formed ...
hydrargyria, hydrargyrism
SYN: mercury poisoning. [L. hydrargyrum, mercury]
hydrargyrum
SYN: mercury. [G. hydrargyros, quicksilver, fr. hydor, water, + argyros, silver]
hydrarthrodial
Relating to hydrarthrosis.
hydrarthrosis
Effusion of a serous fluid into a joint cavity. [ hydr- + G. arthron, joint] - intermittent h. a disorder characterized by a periodically recurring serous effusion into the ...
hydrase
Former name for hydratase.
hydrastine
An alkaloid of hydrastis; an isoquinoline chemically related to narcotine. As the hydrochloride, was used locally in the treatment of catarrhal inflammation of the mucous ...
hydrastinine
A semisynthetic alkaloid prepared from hydrastine; the hydrochloride has been used in uterine hemorrhage and as an oxytocic; in large doses, it is a powerful depressant of the ...
hydrastis
The dried rhizome of H. canadensis (family Ranunculaceae), a native of the eastern U.S.; formerly used in the treatment of chronic catarrhal states of the mucous membranes and ...
hydratase
Trivial name applied, together with dehydratase, to certain hydro-lyases (EC 4.2.1.x) catalyzing hydration-dehydration; e.g., fumarate-malate interconversion by fumarate h..
hydrate
An aqueous solvate (in older terminology, a hydroxide); a compound crystallizing with one or more molecules of water; e.g., CuSO4 5H2O.
hydrated
Combined with water, forming a hydrate. SYN: hydrous.
hydration
1. Chemically, the addition of water; differentiated from hydrolysis, where the union with water is accompanied by a splitting of the original molecule and the water molecule. ...
hydrazide
An organic compound of the general formula RCO–NHNH2; an acyl derivative of hydrazine.
Hydrazine
Hydrazine sulfate, an alternative medicine that has been claimed to be a treatment for cancer. It has been used as a first-line agent in cancer therapy and as a treatment for ...
hydrazine yellow
SYN: tartrazine.
hydrazinolysis
Cleavage of chemical bonds by hydrazine; applied in protein and nucleic acid degradations.
hydrazone
A substance derived from aldehydes and ketones by reaction with hydrazine or a hydrazine derivative to give the grouping R′R″C=N—NHR.
hydremia
A condition in which the blood volume is increased as a result of an increase in the water content of plasma, with or without a reduction in the concentration of protein; there is ...
hydrencephalocele
Protrusion, through a cleft in the skull, of brain substance expanded into a sac containing fluid. SYN: encephalocystocele, hydrocephalocele, hydroencephalocele. [ hydr- + G. ...
hydrencephalomeningocele
Protrusion, through a defect in the skull, of a sac containing meninges, brain substance, and cerebrospinal fluid.
hydrencephalus
Rarely used term for internal hydrocephalus. [ hydr- + G. enkephalos, brain]
hydriatric, hydriatic
Relating to the obsolete use of water to treat or cure disease. SYN: hydrotherapeutic. [ hydr- + G. iatrikos, relating to medicine]
hydric
Relating to hydrogen in chemical combination.
hydride
A negatively charged hydrogen ( i.e., H:−) or a compound of hydrogen in which it assumes a formal negative charge, e.g., sodium borohydride (NaBH4).
hydrindantin
The reduced form of ninhydrin. It is often used in conjunction with ninhydrin in the detection of amino or imino groups.
hydro-, hydr-
1. Water, watery. 2. Containing or combined with hydrogen. 3. A hydatid. [G. hydor, water]
hydro-lyases
A class of lyases (EC 4.2.1.x) comprising enzymes removing H and OH as water, leading to formation of new double bonds within the affected molecule; the trivial name s usually ...
hydroa
Any vesicular or bullous eruption. SYN: hidroa. [hydro + G. oon, egg] - h. aestivale SYN: h. vacciniforme. - h. puerorum SYN: h. vacciniforme. - h. vacciniforme a recurrent ...
hydroadipsia
Absence of thirst for water. [hydro- + G. a- priv. + dipsa, thirst]
hydroappendix
Distention of the vermiform appendix with a serous fluid.
hydrobilirubin
A dark brown-red pigment that may be formed when bilirubin is reduced.
hydrobromate
A salt of hydrobromic acid.
hydrobromic acid
An aqueous solution of hydrogen bromide (HBr); its salts are bromides.
hydrocalycosis
A usually symptomless anomaly of the renal calix that is dilated from obstruction of the infundibulum; usually discovered incidentally at pyelography or autopsy; may become ...
hydrocarbon
A compound containing only hydrogen and carbon. - Diels h. a phenanthrene derivative obtained by the dehydrogenation of various steroids. - saturated h. a h. that contains the ...
Hydrocele
Accumulation of fluid in the coat around the testis. Small hydroceles tend to disappear by a year of age while larger hydroceles may persist and warrant surgery. * * * A ...
hydrocelectomy
Excision of a hydrocele by drainage of its fluids and, sometimes partial excision of tunical vaginalis. [ hydrocele + G. ektome, excision]
hydrocephalic
Relating to or suffering from hydrocephalus.
hydrocephalocele
SYN: hydrencephalocele.
hydrocephaloid
1. Resembling hydrocephalus. 2. A condition in infants suffering from diarrhea or other debilitating disease, in which there are dehydration and general symptoms resembling ...
Hydrocephalus
Hydrocephalus is an abnormal buildup of cerebrospinal fluid (CSF) in the ventricles of the brain. The fluid is often under increased pressure and can compress and damage the ...
Hydrocephalus ex-vacuo
What is termed " hydrocephalus ex-vacuo" occurs when there is damage to the brain caused by stroke or injury, and there may be an actual shrinkage of brain substance. Although ...
Hydrocephalus, Macewen sign of
A sign to detect hydrocephalus (and brain abscess). Percussion (tapping) on the skull at a particular spot (near the junction of the frontal, temporal and parietal bones) yields ...
Hydrocephalus, normal pressure (NPH)
Hydrocephalus is an abnormal buildup of cerebrospinal fluid (CSF) in the brain. The fluid (the CSF) is often under increased pressure which can compress and damage the brain. ...
Hydrocephaly
Also known as hydrocephalus, this is an abnormal buildup of cerebrospinal fluid (CSF) in the ventricles of the brain. The fluid is often under increased pressure and can ...
hydrochloric acid
HCl; the acid of gastric juice. The commercial product is used as an escharotic; the gas and the concentrated solution are strong irritants. SYN: muriatic acid. - diluted h. a ...
hydrochloride
A compound formed by the addition of a hydrochloric acid molecule to a basic moiety on the substance; e.g., guanine h., glycine h..
hydrochlorothiazide
A potent orally effective diuretic and antihypertensive agent related to chlorothiazide; can cause hypokalemia and hyperglycemia.
hydrocholecystis
Rarely used term for an effusion of serous fluid into the gallbladder. [hydro- + G. chole, bile, + kystis, bladder]
hydrocholeresis
Increased output of a watery bile of low specific gravity, viscosity, and solid content. [hydro- + G. chole, bile, + hairesis, a taking]
hydrocholeretic
Pertaining to hydrocholeresis.
hydrocodone
A potent analgesic derivative of codeine used as an antitussive and analgesic. Often used combined with aspirin or acetaminophen. SYN: dihydrocodeinone.
hydrocolloid
A gelatinous colloid in unstable equilibrium with its contained water, useful in dentistry for impressions because of its dimensional stability under controlled conditions. - ...
hydrocolpocele, hydrocolpos
Accumulation of mucus or other nonsanguineous fluid in the vagina. [hydro- + G. kolpos, bosom (vagina)]
hydrocortamate hydrochloride
An ester-salt of hydrocortisone, used topically in the treatment of acute and chronic dermatoses.
hydrocortisone
A reduction product (at C-11) of cortisone; a steroid hormone secreted by the adrenal cortex (the active hormone secreted in the greatest quantity by the adrenals) and the most ...
hydrocotarnine
An alkaloidal principle derived from cotarnine; it is the basic hydrolytic product of narcotine; also obtained from the mother liquors of thebaine.
hydrocyanic acid
HCN; a colorless, very toxic liquid, with the odor of bitter almonds, present in bitter almonds (amygdalin), the stones of peaches, plums and other fruits, and laurel leaves; ...
hydrocyanism
Poisoning with hydrocyanic acid.
hydrocyst
A cyst with clear, watery contents. [hydro- + G. kystis, bladder]
hydrocystoma
1. An eruption of deeply seated vesicles, due to retention of fluid in the sweat follicles. 2. SYN: hidrocystoma. [hydro- + G. kystis, bladder, + -oma, tumor]
hydrodipsia
Water thirst, a characteristic of animals that ordinarily drink water. [hydro- + G. dipsa, thirst]
hydrodipsomania
Periodic episodes of uncontrollable thirst, occasionally found in epileptic patients. [hydro- + G. dipsa, thirst, + mania, frenzy]
hydrodiuresis
Diuresis effected by water.
hydrodynamics
The branch of physics concerned with the flow of liquids. [hydro- + G. dynamis, force]
hydroencephalocele
SYN: hydrencephalocele.
hydrofluoric acid
A solution of hydrogen fluoride gas in water; a poisonous, caustic, foaming liquid that is used to clean metals and can etch glass; extremely irritating to skin and lungs.
hydrogel
A colloid in which the particles are in the external or dispersion phase and water in the internal or dispersed phase. Cf.:hydrosol.
hydrogen
1. A gaseous element, atomic no. 1, atomic wt. 1.00794. 2. The molecular form (H2) of the element. SYN: dihydrogen. [hydro- + G. -gen, producing] - activated h. h. removed by a ...
hydrogen exponent
The decadic logarithm of the hydrogen ion concentration in blood or other fluid; its negative is the pH of that fluid.
hydrogen-1
The common h. isotope, making up 99.985% of the h. atoms occurring in nature. SYN: protium.
hydrogen-2
The isotope of h. of atomic wt. 2; the less common stable isotope of h., making up 0.015% of the h. atoms occurring in nature; the nucleus consists of a proton and a neutron. ...
hydrogen-3
A hydrogen isotope of atomic wt. 3; weakly radioactive, emitting beta particles to become the stable helium-3; half-life, 12.32 years. SYN: tritium.
hydrogenase
1. Any enzyme that removes a hydride ion (or H:−) from NADH (or NADPH). SYN: hydrogenlyase. 2. The enzyme that catalyzes the reaction of 2H+ with ferricytochrome or ...
hydrogenation
Addition of hydrogen to a compound, especially to an unsaturated fat or fatty acid; thus, soft fats or oils are solidified or “hardened.”
hydrogenlyase
SYN: hydrogenase (1).
hydrokinetic
Pertaining to the motion of fluids and the forces giving rise to such motion.
hydrokinetics
That branch of kinetics concerned with fluids in motion.
hydrolabile
Unstable in the presence of water.
hydrolability
A state in which the fluid in the tissues readily changes in amount.
hydrolases
Enzymes (EC class 3) cleaving substrates with addition of H2O at the point of cleavage; e.g., esterases, phosphatases, nucleases, peptidases. SYN: hydrolyzing enzymes. - ...
hydrolymph
The circulating fluid in many of the invertebrates.
hydrolysate
A solution containing the products of hydrolysis.
hydrolysis
A chemical process whereby a compound is cleaved into two or more simpler compounds with the uptake of the H and OH parts of a water molecule on either side of the chemical bond ...
hydrolytic
Referring to or causing hydrolysis.
hydrolyze
To subject to hydrolysis.
hydroma
SYN: hygroma.
hydromassage
Massage produced by streams of water.
hydromeningocele
Protrusion of the meninges of brain or spinal cord through a defect in the bony wall, the sac so formed containing cerebrospinal fluid. [hydro- + G. meninx, membrane, + kele, ...
hydrometer
An instrument for determining the specific gravity or density of a liquid. SYN: areometer, gravimeter. [hydro- + G. meron, measure]
hydrometra
Accumulation of thin mucus or other watery fluid in the cavity of the uterus. [hydro- + G. metra, uterus]
hydrometric
Relating to hydrometry or the hydrometer.
hydrometrocolpos
Distention of uterus and vagina by fluid other than blood or pus. [hydro- + G. metra, uterus, + kolpos, bosom (vagina)]
hydrometry
Determination of the specific gravity of a fluid by means of a hydrometer.
hydromicrocephaly
Microcephaly associated with an increased amount of cerebrospinal fluid.
hydromorphone hydrochloride
A synthetic derivative of morphine, with analgesic potency about 10 times that of morphine. SYN: dihydromorphinone hydrochloride.
hydromphalus
A cystic tumor at the umbilicus, most commonly a vitellointestinal cyst. [hydro- + G. omphalos, umbilicus]
hydromyelia
An increase of fluid in the dilated central canal of the spinal cord, or in congenital cavities elsewhere in the cord substance. [hydro- + G. myelos, marrow]
hydromyelocele
Protrusion of a portion of cord, thinned out into a sac distended with cerebrospinal fluid, through a spina bifida. [hydro- + G. myelos, marrow, + kele, tumor, hernia]
Hydronephrosis
Distention of the kidney with urine. Due to obstruction of urine outflow (for example, by a stone blocking the ureter, the tube going * * * Dilation of the pelvis and calices of ...
hydronephrotic
Relating to hydronephrosis.
hydronium
See h. ion.
hydroparasalpinx
Accumulation of serous fluid in the accessory tubes of the oviduct. [hydro- + G. para, beside, + salpinx, trumpet]
hydropathic
Relating to hydropathy.
hydropathy
The obsolete use of water to treat and cure disease.
hydropenia
Reduction or deprivation of water. [hydro- + G. penia, poverty]
hydropenic
Pertaining to or characterized by hydropenia.
hydropericardium
A noninflammatory accumulation of fluid in the pericardial sac.
hydroperitoneum, hydroperitonia
SYN: ascites. [hydro- + peritoneum]
hydroperoxidases
Those oxidoreductases that require H2O2 as hydrogen acceptors; e.g., peroxidases, catalase.
hydroperoxide
SYN: hydrogen peroxide.
hydrophil, hydrophile
A substance that is hydrophilic.
hydrophilia
A tendency of the blood and tissues to absorb fluid. [hydro- + G. philos, fond]
hydrophilic
1. Denoting the property of attracting or associating with water molecules, possessed by polar radicals or ions, as opposed to hydrophobic (2). 2. Tending to dissolve in water. ...
hydrophilous
SYN: hydrophilic.
hydrophobia
SYN: rabies. [hydro- + G. phobos, fear; from reports of inability to swallow and resultant resistance to oral fluids in human and animal rabies]
hydrophobic
1. Relating to or suffering from hydrophobia. 2. Lacking an affinity for water molecules, as opposed to hydrophilic. SYN: apolar (2). 3. Tending not to dissolve in water. 4. ...
hydrophthalmia, hydrophthalmos, hydrophthalmus
SYN: buphthalmia. [hydro- + G. ophthalmos, eye]
Hydrophyidae
A family of snakes, the true sea snakes, characterized by a vertically compressed tail, giving it a paddle- or oarlike appearance; their fangs, like those of cobras, are small, ...
hydropic
Containing an excess of water or of watery fluid. SYN: dropsical.
hydropneumatosis
Combined emphysema and edema; the presence of liquid and gas in tissues. [hydro- + G. pneuma, breath, spirit]
hydropneumopericardium
The presence of a serous effusion and of gas in the pericardial sac. SYN: pneumohydropericardium. [hydro- + G. pneuma, air, + pericardium]
hydropneumoperitoneum
The presence of gas and serous fluid in the peritoneal cavity. SYN: pneumohydroperitoneum. [hydro- + G. pneuma, air, + peritoneum]
hydropneumothorax
The presence of both gas and fluids in the pleural cavity. SYN: pneumohydrothorax, pneumoserothorax. [hydro- + G. pneuma, air, + thorax]
hydroposia
Water-drinking, a characteristic of animals that ordinarily drink water. [hydro- + G. posis, drinking]
hydrops
An excessive accumulation of clear, watery fluid in any of the tissues or cavities of the body; synonymous, according to its character and location, with ascites, anasarca, ...
Hydrops fetalis
Gross edema (swelling), usually with anemia, of the fetus. It can be due to Rh blood group incompatibility, in which antibodies crossing the placenta from the mother destroy the ...
hydropyonephrosis
Presence of purulent urine in the pelvis and calices of the kidney following obstruction of the ureter. [hydro- + G. pyon, pus, + nephrosis]
hydroquinol
SYN: hydroquinone.
hydroquinone
An antioxidant used in ointments. SYN: hydroquinol, quinol.
hydrorchis
A collection of fluid ( hydrocele) around the testis, as in the tunica vaginalis or along the spermatic cord. [hydro- + G. orchis, testicle]
hydrorheostat
A rheostat in which resistance to the flow of electric current is provided by water.
hydrorrhea
A profuse discharge of watery fluid from any part of the body. [hydro- + G. rhoia, flow] - h. gravidae, h. gravidarum discharge of a watery fluid from the vagina during pregnancy.
hydrosalpinx
Accumulation of serous fluid in the fallopian tube, often an end result of pyosalpinx. SYN: hydrops tubae. [hydro- + G. salpinx, trumpet] - intermittent h. intermittent ...
hydrosarca
SYN: anasarca. [hydro- + G. sarx, flesh]
hydrosarcocele
A chronic swelling of the testis complicated with hydrocele. [hydro- + G. sarx, flesh, + kele, tumor]
hydrosol
A colloid in aqueous solution, the particles being in the dispersed or internal phase and the water in the external or dispersion phase. Cf.:hydrogel.
hydrosphygmograph
A sphygmograph in which the pulse beat is transmitted to the recorder through a column of water.
hydrostat
A device for regulating water level. [hydro- + G. statikos, causing to stand]
hydrostatic
Relating to the pressure of fluids or to their properties when in equilibrium.
hydrosudopathy
SYN: hydrosudotherapy. [hydro- + L. sudor, sweat, + G. pathos, suffering]
hydrosudotherapy
Hydrotherapy combined with induced sweating, as in the Turkish bath. SYN: hydrosudopathy.
hydrosyringomyelia
SYN: syringomyelia. [hydro- + G. hydor, water, + syrinx, a tube, + myelos, marrow]
hydrotaxis
The movement of cells or organisms in relation to water. [hydro- + G. taxis, arrangement]
hydrotherapeutic
SYN: hydriatric.
hydrotherapeutics
SYN: hydrotherapy.
hydrotherapy
Therapeutic use of water by external application, either for its pressure effect or as a means of applying physical energy to the tissues. SYN: hydrotherapeutics. [hydro- + G. ...
hydrothermal
Relating to hot water. [hydro- + G. therme, heat]
hydrothionemia
The presence of hydrogen sulfide in the circulating blood. [hydro- + G. theion, sulfur, + haima, blood]
hydrothionuria
The excretion of hydrogen sulfide in the urine. [hydro- + G. theion, sulfur, + ouron, urine]
hydrothorax
SYN: pleural effusion. - chylous h. SYN: chylothorax.
hydrotomy
In histology, tearing apart the tissue elements by injection of water. [hydro- + G. tome, a cutting]
hydrotropism
The property in growing organisms of turning toward a moist surface (positive h.) or away from a moist surface (negative h.). [hydro- + G. tropos, a turning]
hydrotubation
Injection of a liquid medication or saline solution through the cervix into the uterine cavity and fallopian tubes for dilation and/or treatment of the tubes.
hydroureter
SYN: ureterectasia.
hydroureteronephrosis
SYN: ureterohydronephrosis.
hydrous
SYN: hydrated.
hydrovarium
A collection of fluid in the ovary. SYN: hydrops ovarii.
hydroxamic acids
R—CO—NH—OH ⇄ RC(OH)=N—OH; hydroxylamine derivatives of carboxylic acid s, including amino acid s, formed by the action of hydroxylamine.
hydroxide
1. A compound containing a potentially ionizable hydroxyl group; particularly a compound that liberates OH− upon dissolving in water. 2. The h. anion, OH−.
hydroxocobalamin
Vitamin B12b, differing from cyanocobalamin (vitamin B12) in the presence of a hydroxyl ion in place of the cyanide ion at the sixth coordinate position on the cobalt atom. ...
hydroxocobemine
SYN: hydroxocobalamin.
hydroxy acid
An organic acid containing both OH and COOH groups; e.g., lactic acid.
hydroxy-
Prefix indicating addition or substitution of the –OH group to or in the compound whose name follows. SEE ALSO: oxa-, oxo-, oxy-.
hydroxyacetic acid
SYN: glycolic acid.
hydroxyacylglutathione hydrolase
An enzyme with catalytic activity similar to that of lactoylglutathione lyase, but more general; catalyzes the hydrolysis of an S-2-hydroxyacylglutathione, producing glutathione ...
Hydroxyapatite
A major component and an essential ingredient of normal bone and teeth. Hydroxyapatite makes up bone mineral and the matrix of teeth. It is hydroxyapatite that gives bones and ...
Hydroxyapatite crystal disease
The inflammation caused by hydroxyapatite crystals has been referred to as hydroxyapatite crystal disease. Hydroxyapatite is a major component and an essential ingredient of ...
hydroxycarbamide
SYN: hydroxyurea.
hydroxychloroquine sulfate
A quinoline derivative; an antimalarial agent whose actions and uses resemble those of chloroquine phosphate; also used in the treatment of lupus erythematosus and rheumatoid ...
hydroxychroman
SYN: chromanol.
hydroxychromene
SYN: chromenol.
hydroxyephedrine
A sympathomimetic agent for the treatment of shock.
hydroxyfatty acid
A fatty acid that has a hydroxyl group covalently attached to it ( E.G., in hydroxynervone).
hydroxyhemin
SYN: hematin.
hydroxykynureninuria
An abnormality in tryptophan metabolism, probably due to a defect in kynureninase, characterized by mild mental retardation, migraine-like headaches, and urinary excretion of ...
hydroxyl
The radical or moiety, –OH.
hydroxylamine
1. NH2OH; a partially oxidized derivative of ammonia; reacts with carbonyl groups to produce oximes; forms acid salts, e.g., h. hydrochloride. It is a chemical mutagen that ...
hydroxylamino
The monovalent group or moiety, —NH—OH.
hydroxylapatite
SYN: hydroxyapatite.
hydroxylases
Enzymes catalyzing formation of hydroxyl groups by addition of an oxygen atom, hence oxidizing the substrate; most are found in EC subclass 1.14.
hydroxylation
Placing of a hydroxyl group on a compound in a position where one did not exist before.
hydroxynervone
A cerebroside containing α-hydroxynervonic acid. SYN: oxynervone.
hydroxynervonic acid
An important constituent of certain cerebrosides.
hydroxyphenyluria
Urinary excretion of tyrosine and phenylalanine, as a result of ascorbic acid deficiency; occurs notably in those premature infants who lack this vitamin.
hydroxyprolinemia
A metabolic disorder characterized by mental retardation and microscopic hematuria in some patients; associated with enhanced plasma concentration and urinary excretion of free ...
hydroxystilbamidine isethionate
An antifungal and antiprotozoan agent used in the treatment of the nonprogressive cutaneous form of blastomycosis.
hydroxytoluic acid
SYN: mandelic acid.
hydroxytryptophan decarboxylase
SYN: aromatic d-amino acid decarboxylase.
hydroxyurea
An oral antineoplastic agent that inhibits DNA synthesis; used in the treatment of a variety of malignancies including melanoma, chronic myelocytic leukemia, and carcinoma of ...
hydroxyzine
A mild sedative and minor tranquilizer used in neuroses; available as the hydrochloride and pamoate. Often used to prevent nausea and to enhance the effects of narcotics.
Hydrozoa
A class of coelenterates or jellyfishes, including Hydra, a freshwater polyp, Physalia, the “Portuguese man-of-war,” Millepora, a stinging coral, and the sea wasps, Chironex ...
hygieiology
The science of hygiene and sanitation, and the practice thereof. [G. hygieia, health, + -logia]
hygieist
SYN: hygienist. [G. hygieia, health]
Hygiene
The science of preventive medicine and the preservation of health. From the name of Hygeia, the daughter of Asklepios, the Greek god of medicine (whose staff with entwined ...
hygienic
Healthful; relating to hygiene; tending to maintain health.
hygienist
One who is skilled in the science of health and its maintenance. SYN: hygieist. - dental h. a licensed, professional auxiliary in dentistry who is both an oral health educator ...
hygr-
See hygro-.
hygric
Relating to moisture. [G. hygros, moist]
hygric acid
N-Methylproline, the methylbetaine of which is stachydrine.
hygro-, hygr-
Moisture, humidity; opposite of xero-. [G. hygros, moist]
hygroma
A cystic swelling containing a serous fluid, such as housemaid's knee, etc. SYN: hydroma. [hygro- + G. -oma, tumor] - h. axillare h. of the axillary region. - cervical h. a ...
hygrometer
Any device for measuring the water vapor in the atmosphere, usually indicating relative humidity directly. [hygro- + G. metron, measure]
hygrometry
SYN: psychrometry.
hygrophobia
Morbid fear of dampness or moisture. [hygro- + G. phobos, fear]
hygroscopic
Denoting a substance capable of readily absorbing and retaining moisture; e.g., NaOH, CaCl2.
hygrostomia
SYN: sialorrhea. [hygro- + G. stoma, mouth]
Hyl
Symbol for hydroxylysine or hydroxylysyl ( 5Hyl specifically refers to 5-hydroxylysine).
hyla
A lateral extension of the cerebral (or sylvian) aqueduct. [G. hyle, wood]
hylephobia
Morbid fear of forests. [G. hyle, forest, + phobos, fear]
Hymen
A thin membrane which completely or partially occludes the vaginal opening. The hymen is a fold of mucous membrane usually present at birth at the orifice of the vagina. It is ...
hymenal
Relating to the hymen.
hymenectomy
Excision of the hymen. [G. hymen, membrane, + ektome, excision]
hymenitis
Inflammation of the hymen.
hymenoid
1. SYN: membranous. 2. Resembling the hymen.
hymenolepiasis
Illness produced by infection with tapeworms of the genus Hymenolepis.
hymenolepidid
Common name for tapeworms of the family Hymenolepididae.
Hymenolepididae
A family of tapeworms (order Cyclophyllidea) that includes the medically important genus Hymenolepis. [G. hymen, membrane, + lepis, rind]

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