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Слова на букву anch-basi (2629)

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Appendix testis
A small solid projection of tissue on the outer surface of the testis which is a remnant of the embryologic mullerian duct.
apperception
1. The final stage of attentive perception in which something is clearly apprehended and thus is relatively prominent in awareness; the full apprehension of any psychic content. ...
apperceptive
Relating to, involved in, or capable of apperception.
appersonation, appersonification
A delusion in which one assumes the character of another person.
appestat
The mechanism in the brain (possibly in the hypothalamus) concerned with the appetite and control of food intake. [appetite + G. statos, standing]
appetite
A desire or motive derived from a biologic or psychological need for food, water, sex, or affection; a desire or longing to satisfy any conscious physical or mental need. SYN: ...
applanation
In tonometry, the flattening of the cornea by pressure. Intraocular pressure is directly proportional to external pressure, and inversely proportional to the area flattened. SEE ...
applanometry
Use of an applanation tonometer.
apple oil
SYN: amyl valerate.
appliance
A device used to improve function of a part, or for therapeutic purposes. [fr, O. Fr. aplier, to apply, fr. L. applico, to fold together] - craniofacial a. a device used to ...
applicand.
Abbreviation for applicandus, to be applied. [L.]
applicator
A slender rod of wood, flexible metal, or synthetic material, at one end of which is attached a pledget of cotton or other substance for making local applications to any ...
Apposition
The word "apposition" has several senses including the act of adding or accretion and also the putting of things in juxtaposition, or side by side. Growth by apposition is a ...
approach
1. In psychiatry, a term used to describe how interpersonal relationships are negotiated. 2. The path or method used to expose the operative field during an operation. [M.E., ...
approximate
To bring close together. In dentistry : 1. Proximate, denoting the contact surfaces, either mesial or distal, of two adjacent teeth. 2. Close together; denoting the teeth in the ...
approximation
In surgery, bringing tissue edges into desired apposition for suturing. - steady state a. an assumption in the derivation of an enzyme rate expression in which the rate of ...
APR
Abbreviation for abdominoperineal resection.
apractagnosia
SYN: constructional apraxia. [G. a- priv. + praktea, things to be done, + gnosis, recognition]
apractic
SYN: apraxic.
apragmatism
An interest in theory or dogmatism rather than in practical results. [G. a- priv. + pragmatism]
Apraxia
The inability to execute a voluntary motor movement despite being able to demonstrate normal muscle function. Apraxia is not related to a lack of understanding or to any kind of ...
Apraxia of speech
A severe speech disorder characterized by inability to speak, or a severe struggle to speak clearly. Apraxia of speech occurs when the oral- motor muscles do not or cannot obey ...
apraxic
Marked by or pertaining to apraxia. SYN: apractic.
apricot kernel oil
See persic oil.
aproctia
Congenital absence or imperforation of the anus. [G. a- priv. + proktos, anus]
aprofen, aprofene, aprophen
Analgesic and antispasmodic.
aprosody
Absence, in speech, of the normal pitch, rhythm, and variations in stress. [G. a- priv. + prosodia, voice modulation]
aprosopia
Congenital absence of the greater part or all of the face, usually associated with other malformations. [G. a- priv. + prosopon, face]
aprotinin
A protease and kallikrein inhibitor obtained from animal organs; a polypeptide with a molecular weight of about 6000. May be useful in the treatment of pancreatitis and in ...
APS
Abbreviation for adenosine 5′-phosphosulfate.
APS (autoimmune polyglandular syndrome)
1. A genetic autoimmune disease with an extraordinary array of clinical features but characterized most often by at least 2 of the following 3 findings: hypoparathyroidism — ...
aPTT
Abbreviation for activated partial thromboplastin time.
APUD
Proposed designation for a group of cells in different organs secreting polypeptide hormones or neurotransmitters. Cells in this group have certain biochemical characteristics in ...
apurinic acid
DNA from which the purine bases have been removed by mild acid treatment.
apyknomorphous
Denoting a cell or other structure that does not stain deeply because the stainable or chromophil material is not closely aggregated. [G. a- priv. + pyknos, thick, + morphe, ...
apyrase
An enzyme catalyzing hydrolytic removal of two orthophosphate residues from adenosine 5′-triphosphate to yield adenosine 5′-monophosphate; i.e., ATP + 2H2O → AMP + 2Pi. ...
apyretic
SYN: afebrile.
apyrexia
Absence of fever. [G. a- priv. + pyrexis, fever]
apyrexial
SYN: afebrile.
apyrimidinic acid
DNA from which the pyrimidine bases have been removed by chemical treatment ( e.g., exposure to hydrazine).
aq.
Abbreviation for L. aqua, water.
aq. bull.
Abbreviation for L. aqua bulliens, boiling water.
aq. dest.
Abbreviation for L. aqua destillata, distilled water.
aq. ferv.
Abbreviation for L. aqua fervens, hot water.
aq. frig.
Abbreviation for L. aqua frigida, cold water.
aqua
H2O. Pharmaceutical waters, aquae, are aqueous solutions of volatile substances ( e.g., rose water). Pharmaceutical solutions, liquors, are aqueous solutions of nonvolatile ...
aquacobalamin
Vitamin B12a ( tautomeric with B12b); a cobalamin derivative in which the sixth coordinate bond of the cobaltic ion is attached to a water molecule. SEE ALSO: vitamin B12. SYN: ...
Aquaphobia
An abnormal and persistent fear of water. Sufferers from aquaphobia experience anxiety even though they realize the water in an ocean, a river, a lake, a creek or even a bathtub ...
aquapuncture
Rarely used term for a hypodermic injection of water. [L. aqua, water, + punctura, puncture]
Aquaspirillum
A genus of motile, nonsporeforming, aerobic bacteria (family Spirillaceae) containing Gram-negative, rigid, helical or helically curved cells that are 0.2–1.5 μm in diameter. ...
aquatic
1. Of or pertaining to water. 2. Denoting an organism that lives in water.
aqueduct
A conduit or canal. SYN: aqueductus. [L. aquaeductus] - cerebral a. an ependyma-lined canal in the mesencephalon about 20 mm long, connecting the third to the fourth ventricle. ...
Aqueduct of Sylvius
A canal that communicates between the third and fourth ventricles in a system of four communicating cavities within the brain that are continuous with the central canal of the ...
Aqueduct of the midbrain
A canal that communicates between the third and fourth ventricles in a system of four communicating cavities within the brain that are continuous with the central canal of the ...
aqueductus
SYN: aqueduct. [L. fr. aqua, water, + ductus, a leading, fr. duco, pp. ductus, to lead] - a. cerebri [offalt] cerebral aqueduct. - a. cochleae [TA] SYN: cochlear aqueduct. - ...
aqueous
Watery; of, like, or containing water.
Aqueous humor
In medicine, humor refers to a fluid (or semifluid) substance. Thus, the aqueous humor is the fluid normally present in the front and rear chambers of the eye. It is a clear, ...
aquiparous
Secreting or excreting a watery fluid. [L. aqua, water, + pario, to bring forth]
aquo-ion
A hydrated ion; an ion containing one or more water molecules; e.g., Cu(H2O)42+.
aquocobalamin
SYN: aquacobalamin.
aquosity
1. The state of being watery. 2. Moisture.
Ar
Symbol for argon.
Ara
Symbol for arabinose, or its mono- or diradical.
ara-
Prefix for arabinose or arabinosyl.
arab-
Gum arabic; similar gummy substances. [G. Araps, Arabos, an Arab]
araban
A polysaccharide that yields arabinose on hydrolysis; a constituent of some pectins.
arabic
Relating to or derived from various species of Acacia having a gummy or resinous exudate.
arabic acid
SYN: arabin.
Arabidopsis thaliana genome
All of the genetic information contained in Arabidopsis thaliana, a plant belonging to the mustard family. The genomes of particular nonhuman organisms such as Arabidopsis have ...
arabin
A carbohydrate gum, hydrolyzing to d-arabinose and hexoses, found naturally in union with calcium, potassium, and magnesium ions, when it is called gum arabic. SYN: arabic ...
arabinoadenosine
SYN: arabinosyladenine.
arabinocytidine
SYN: arabinosylcytosine.
arabinofuranosyladenine
An arabinoside that has antiviral activity.
arabinofuranosylcytosine
SYN: arabinosylcytosine.
arabinose
A pentose; both of its enantiomers are widely distributed in plants, usually in complex polysaccharides; used in culture media. d- A. is an epimer of d-ribose. [ arabin + -ose ...
arabinoside
A ribonucleoside in which the sugar moiety is arabinose. It often has antibiotic activity.
arabinosis
Disordered metabolism of arabinose.
arabinosuria
Excretion of arabinose in the urine.
arabinosyladenine
Used for herpes simplex corneae and vaccinial keratitis. SYN: arabinoadenosine.
arabinosylcytosine
A compound of arabinose and cytosine, analogous to ribosylcytosine (cytidine), that inhibits the biosynthesis of DNA; used as a chemotherapeutic agent because of antiviral ...
arabitol
A sugar alcohol obtained from the reduction of arabinose.
AraC
Abbreviation for cytosine arabinoside.
araC
Symbol for arabinosylcytosine.
arachic acid
SYN: arachidic acid.
arachidic acid
A fatty acid contained in peanut oil, butter, and other fats. SYN: arachic acid, n-eicosanoic acid, n-icosanoic acid. [Arachis, fr. G. arakis, leguminous weed]
arachidonic acid
5,8,11,14-Eicosatetraenoic (icosatetraenoic) acid; an unsaturated fatty acid, usually essential in nutrition; the biological precursor of the prostaglandins, the thromboxanes, ...
arachidonic acid cascade
Eicosanoid synthetic pathway.
arachis oil
SYN: peanut oil.
arachnephobia
Morbid fear of spiders. SYN: arachnophobia. [G. arachne, spider, + phobos, fear]
Arachnia
A genus of nonmotile, nonsporeforming, facultatively anaerobic bacteria (family Actinomycetaceae) containing Gram-positive, non–acid-fast, branched, diphtheroid rods ...
Arachnida
A class of arthropods in the subphylum Chelicerata, consisting of spiders, scorpions, harvestmen, mites, ticks, and allies. [G. arachne, spider]
arachnidism
Systemic poisoning following the bite of a spider (especially of the black widow). - necrotic a. a. caused by spiders belonging to the genus Loxosceles; cutaneous necrosis ...
Arachnodactyly
Long spider-like fingers and toes, a frequent finding in Marfan syndrome, a heritable disorder of connective tissue. "Arachnodactyly" is derived from the Greek "arachne" ...
arachnoid
SYN: a. mater. [G. arachne, spider, cobweb, + eidos, resemblance] - a. of brain SYN: cranial a. mater. - cranial a. mater [TA] that portion of the a. that lies within the ...
arachnoidal
Relating to the arachnoid membrane, or arachnoidea.
arachnoidea mater, arachnoides
SYN: arachnoid mater. [Mod. L. arachnoideus fr. G. arachne, spider, + eidos, resemblance] - a. spinalis [TA] SYN: spinal arachnoid mater.
arbor
In anatomy, a treelike structure with branchings. [L. tree] - a. vitae [TA] the arborescent appearance of gray and white matter in sagittal sections of the cerebellum. - a. ...
arborescent
SYN: dendriform.
arborization
1. The terminal branching of nerve fibers or blood vessel s in a branching treelike pattern. 2. The branched pattern formed under certain conditions by a dried smear of ...
arborize
To spread in a treelike branching pattern.
arboroid
Denoting a colony of protozoa, each of which remains attached to another cell or to the main stem at one point, forming a branching or dendritic figure. [L. arbor, tree, + G. ...
Arborvirus
What's in a name? Although 'arbor' sounds as if it should have something to do with trees, it doesn’t. It comes from the first 2 letters of arthropod + the first 3 letters ...
Arboviral encephalitis
1. Antibiotics are not effective for treatment and no effective antiviral drugs have yet been discovered for the arboviruses. Treatment is supportive, attempting to deal with ...
Arbovirus
A class of viruses transmitted to humans by arthropods such as mosquitoes and ticks. The first two letters of the words arthropod' and borne, make up the 'arbo' that now ...
ARC
Abbreviation for AIDS-related complex.
arc
1. A curved line or segment of a circle. 2. Continuous luminous passage of an electric current in a gas or vacuum between two or more separated carbon or other electrodes. [L. ...
arcade
An anatomic structure or structures (especially a blood vessel) taking the form of a series of arches. [L. arcus, arc, bow] - anomalous mitral a. short chordae tendineae ...
Arcanobacterium
A genus of nonmotile, facultatively anaerobic bacteria containing Gram-positive slender irregular rods, sometimes showing clubbed ends that may be in V formation with no ...
arcate
SYN: arcuate.
arch
Any structure resembling a bent bow or an a.; an arc. In anatomy, any vaulted or archlike structure. See arcus. SYN: arcus [TA]. [thru O. Fr. fr. L. arcus, bow] - ...
Arch, aortic
The aortic arch is the second section of the aorta, the largest artery in the body. The aorta arises from the left ventricle of the heart and first goes up, then bends, and goes ...
Arch, zygomatic
The bone that forms the prominence of the cheek. The zygomatic bone is also known as the zygoma, the zygomatic arch, malar bone, yoke bone. The word "zygomatic" comes from ...
arch-, arche-, archi-
Combining forms meaning primitive or ancestral; also first, chief, extreme. [G. arche, origin, beginning, + -o-]
Archaea
A unique group of microorganisms classified as bacteria (Archaeobacteria) but genetically and metabolically different from all other known bacteria. They appear to be living ...
archaeocerebellum
SYN: archicerebellum. [G. archaios, ancient, + cerebellum]
Archaeogenetics
The study of the past using the techniques of molecular genetics. The application of genetics to archeology. The term "archaeogenetics" was coined in the 1990s by the archeologist ...
archaeus
Term first used by Valentine and later by Paracelsus and van Helmont to denote a spirit that presided over and governed bodily processes. SYN: archeus. [L. fr. G. archaios, ...
archaic
Ancient; old; in jungian psychology, denoting the ancestral past of mental processes. [G. archaikos, ancient]
Archambault
LaSalle, U.S. neurologist, 1879–1940. See Meyer-A. loop.
arche-
See arch-.
archenteron
SYN: primitive gut. [G. arche, beginning, + enteron, intestine]
archeocerebellum
SYN: vestibulocerebellum.
archeokinetic
Denoting a low and primitive type of motor nerve mechanism, such as is found in the peripheral and the ganglionic nervous systems. Cf.:neokinetic, paleokinetic. [G. archaios, ...
archetype
1. A primitive structural plan from which various modifications have evolved. 2. In jungian psychology, structural manifestation of the collective unconscious. SYN: imago (2). ...
archeus
SYN: archaeus.
archi-
See arch-.
archicerebellum
The small, phylogenetically oldest portion of the cerebellum, sometimes called vestibulocerebellum because its afferents arise primarily from the vestibular ganglion and nuclei; ...
archicortex
1. Typically, the phylogenetically older parts of the cerebral cortex. 2. More specifically, the cortex forming the hippocampus. SEE ALSO: allocortex, cerebral cortex. SYN: ...
archil
A violet dye from the lichens Rocella tinctoria and R. fuciformis. SYN: orchella, orchil, roccellin.
archin
SYN: emodin.
archipallium
SYN: archicortex. [ archi- + L. pallium]
architectonics
SYN: cytoarchitecture.
archwire
A device consisting of a wire conforming to the alveolar or dental arch, used as an anchorage in correcting irregularities in the position of the teeth. SYN: arch wire.
arciform
SYN: arcuate.
Arcobacter
A genus of bacteria in the family Campylobacteraceae that are Gram-negative, aerotolerant, and able to grow at 15° C. The type strain is A. butzleri. - A. butzleri a bacterial ...
arctation
A narrowing, contraction, stricture, or coarctation. [L. arto (improp. arcto), pp. -atus, to tighten]
arcual
Relating to an arch.
arcuate
Denoting a form that is arched or has the shape of a bow. SYN: arcate, arciform. [L. arcuatus, bowed]
arcuation
A bending or curvature.
arcus
SYN: arch. [L. a bow] - a. adiposus SYN: a. senilis. - a. alveolaris mandibulae [TA] SYN: alveolar arch of mandible. - a. alveolaris maxillae [TA] SYN: alveolar arch of maxilla. - ...
Arcus senilis
A cloudy opaque arc or circle around the edge of the eye, often seen in the eye of the elderly.
ARD
Acronym that stands for a disorder known as Adult Respiratory Distress or Acute Respiratory Distress. Also referred to as ARDS (ARD Syndrome). In ARD there is respiratory ...
ardor
Old term for a hot or burning sensation. [L. fire, heat]
ARDS
Abbreviation for adult respiratory distress syndrome.
area
1. [TA] Any circumscribed surface or space. 2. All of the part supplied by a given artery or nerve. 3. A part of an organ having a special function, as the motor a. of the ...
areatus, areata
Occurring in patches or circumscribed areas. [L.]
Areca
A genus of palms of India and the Malay Archipelago. A species, A. catechu, furnishes a. nuts, or betel nut s, which contain arecoline and 15% red tannin, are chewed in the ...
arecaidine
A crystalline alkaloid resembling betaine, derived from the betel nut. SYN: arecaine.
arecaine
SYN: arecaidine.
arecoline
A colorless oily alkaloid from the betel nut.
Areflexia
Absence of neurologic reflexes such as the knee jerk reaction. * * * Absence of reflexes. - detrusor a. a failure of the detrusor muscle to have a reflex contraction even ...
arenaceous
Sandy; of sandlike consistency. [L. arena, sand]
Arenaviridae
A family of over 15 RNA viruses, many of which are natural parasites of rodents, that includes lymphocytic choriomeningitis virus, Lassa virus, and the Tacaribe virus complex. ...
Arenavirus
A genus in the family Arenaviridae that is associated with lymphocytic choriomeningitis and a number of hemorrhagic fevers.
Areola
1. The small darkened area around the nipple of the breast. 2. The colored part of the iris around the pupil of the eye. 3. Any small space in a tissue. * * * 1. [NA] Any small ...
areolar
Relating to an areola.
areometer
SYN: hydrometer. [G. araios, thin, + G. metron, measure]
Arg
Symbol for arginine or its mono- or diradical.
Argas
A genus of soft ticks of the family Argasidae, some species of which usually infest birds but may attack humans. - A. reflexus the pigeon tick, a species that may cause a ...
argasid
Common name for members of the family Argasidae.
Argasidae
Family of ticks (superfamily Ixodoidea, order Acarina), the soft ticks, so called because of their wrinkled, leathery, tuberculated appearance that fills out when the tick is ...
argentaffin, argentaffine
Pertaining to cells or tissue elements that reduce silver ions in solution, thereby becoming stained brown or black. [L. argentum, silver, + affinitas, affinity]
Argentaffinoma
A tumor which secretes large amounts of the hormone serotonin. Argentaffinoma is also called carcinoid tumor. The tumor usually arises in the gastrointestinal tract, anywhere ...
argentation
Impregnation with a silver salt. SEE ALSO: argyria. [L. argentum, silver]
argentic
1. Relating to silver. SYN: argyric (1). 2. Denoting a chemical compound containing silver as the rare dication (Ag2+).
argentine
Relating to, resembling, or containing silver.
argentous
Denoting a chemical compound containing silver as a singly charged (Ag+) ion. The vast majority of silver compounds contain the a. ion; where the ionic state of silver is not ...
argentum
SYN: silver. [L.]
arginase
An enzyme of the liver that catalyzes the hydrolysis of l-arginine to l-ornithine and urea; a key enzyme of the urea cycle. A deficiency of a. leads to arginemia. SYN: canavanase.
Arginine
An amino acid, one of the 20 amino acids that serve as the building blocks in protein. Arginine is not an "essential" amino acid. (It is not essential to the diet, but can be made ...
argininosuccinase
SYN: argininosuccinate lyase.
argininosuccinate lyase
An enzyme cleaving l-argininosuccinate nonhydrolytically to l-arginine and fumarate; a deficiency of this enzyme leads to argininosuccinoaciduria; a key step in the urea cycle. ...
argininosuccinic acid
Formed as an intermediate in the conversion of l-citrulline to l-arginine in the urea cycle.
argininosuccinicaciduria
A disorder of urea cycle due to a deficiency of argininosuccinate lyase; characterized by physical and mental retardation, epilepsy, ataxia, liver disease, friable, tufted hair, ...
arginyl
The aminoacyl radical of arginine.
argipressin
SYN: arginine vasopressin.
argon
A gaseous element, atomic no. 18, atomic wt. 39.948, present in the dry atmosphere in the proportion of about 0.94%; one of the noble gases. [G. ntr. of argos, lazy, inactive, ...
Argyll Robertson
Douglas, Scottish ophthalmologist, 1837–1909.
argyria
A slate-gray or bluish discoloration of the skin and deep tissues, due to the deposit of insoluble albuminate of silver, occurring after the medicinal administration for a ...
argyric
1. SYN: argentic (1). 2. Relating to argyria.
argyrism
SYN: argyria.
argyrol
SYN: mild silver protein.
argyrophil, argyrophile
Pertaining to tissue elements that are capable of impregnation with silver ions and being made visible after an external reducing agent is used. SYN: argentophil, argentophile. ...
arhinia
Congenital absence of the nose. SYN: arrhinia.
Arhythmia
We do not usually give a misspelling but this is a frequent misspelling of arrhythmia (with two r's), meaning an abnormal heart rhythm. In an arrhythmia the heartbeats may be ...
Arias-Stella
Javier, Peruvian pathologist, *1924. See Arias- Stella effect, Arias- Stella phenomenon, Arias- Stella reaction.
ariboflavinosis
Properly hyporiboflavinosis : a nutritional condition produced by a deficiency of riboflavin in the diet, characterized by cheilosis and magenta tongue and usually associated ...
Aristolochia fangchi
A Chinese herb that is injurious to the kidney and is also associated with an increased risk of cancer of the urinary system. Aristolochia can cause kidney failure requiring renal ...
aristolochic acid
An aromatic bitter derived from plants of the genus Aristolochia.
aristotelian
Attributed to or described by Aristotle.
Aristotle
Of Stagira, Greek philosopher and scientist, 384–322 B.C. See A. anomaly, aristotelian method.
arithmomania
A morbid impulse to count. [G. arithmeo, to count, fr. arithmos, number, + mania, madness]
Arizona
Former name for Salmonella enterica, subspecies arizonae. - A. hinshawii former name for Salmonella enterica subsp. arizonae.
Arlt
Carl Ferdinand von, Austrian ophthalmologist, 1812–1887. See A. operation, A. sinus.
Arm
In popular usage, the arm extends from the shoulder to the hand. However, in medical terminology, the arm refers to the upper extremity extending from the shoulder only to the ...
armamentarium
All the therapeutic means available to the health practitioner for professional practice. [L. an arsenal, fr. armamenta, implements, tackle, fr. arma, armor, arms]
Armanni
Luciano, Italian pathologist, 1839–1903. See A.-Ebstein kidney, A.-Ebstein change.
armarium
Rarely used term for the physician's library, as part of her or his armamentarium. [L. a closet, chest, fr. arma, armor]
Armed tapeworm
The pork tapeworm, Taenia solium, a worm contracted from undercooked or measly pork, pork infected with the larval forms of the tapeworm. The worm can grow to be 3-6 feet ...
Armillifer
A genus of Pentastomida (order Porocephalida, family Porocephalidae); adults are found in the lungs of reptiles and the young in many mammals, including humans. [O. Fr. armille, ...
Armitage
Peter, British statistician, (1924-). See A.-Doll model.
armpit
SYN: axilla.
Armstrong
Arthur Riley, Canadian physician, *1904. See King-A. unit. Henry E., British physician.
ARN
Acronym for acute retinal necrosis.
Arndt
Rudolph G., German psychiatrist, 1835–1900. See A. law.
Arneth
Joseph, German physician, 1873–1956. See A. classification, A. count, A. formula, A. index, A. stages, under stage.
arnica
The dried flower heads of A. montana (family Compositae); Obsolete cardiac sedative seldom given internally; used externally for sprains and bruises; formerly widely used as a ...
Arnold
Julius, German pathologist, 1835–1915. See A. bodies, under body, A.-Chiari deformity, A.-Chiari malformation, A.-Chiari syndrome. Friedrich, German anatomist, 1803–1890. See ...
Aromatase
An enzyme (actually an enzyme complex) involved in the production of estrogen that acts by catalyzing the conversion of testosterone (an androgen) to estradiol (an estrogen). ...
Aromatase inhibitor
A drug that inhibits the enzyme aromatase and thus lowers the level of the estrogen, estradiol. Aromatase inhibitors are a class of antiestrogens. Aromatase catalyzes the ...
Aromatherapy
A form of alternative medicine based on the use of very concentrated "essential" oils from the flowers, leaves, bark, branches, rind or roots of plants with purported healing ...
aromatic
1. Having an agreeable, somewhat pungent, spicy odor. 2. One of a group of vegetable drugs having a fragrant odor and slightly stimulant properties. 3. See a. compound. [G. ...
aromatic d-amino acid decarboxylase
An enzyme that catalyzes the decarboxylation of l-dopa to dopamine, of l-tryptophan to tryptamine, and of l-hydroxytryptophan to serotonin; important in the biosynthetic ...
arotinoid
A synthetic polyaromatic retinoid derivative of vitamin A. SEE ALSO: retinoid, retinoic acid. [aromatic + retinoid]
aroyl
The radical of an aromatic acid ( e.g., benzoyl); analogous to acyl, the more general term.
arrack
A strong alcoholic liquor distilled from dates, rice, sap of the coconut palm, and other substances. [Ar. sweet juice]
Arrayed library
In genetics, an arrayed library consists of (in technical terms) individual primary recombinant clones which are hosted in phage, cosmid, YAC, or another vector that have been ...
arrector
SYN: erector. [L. that which raises, fr. ar-rigo, pp. -rectus, to raise up]
Arrector pili
A microscopic band of muscle tissue which connects a hair follicle to the dermis. When stimulated, the arrector pili will contract and cause the hair to become more ...
Arrectores pilorum
Tiny muscles that act as the hair erector muscles. The arrectores pilorum play a key role in goose bumps, a temporary local change in the skin The chain of events leading to ...
arrest
1. To stop, check, or restrain. 2. A stoppage; interference with, or checking of, the regular course of a disease, a symptom, or the performance of a function. 3. Inhibition of ...
arrhaphia
SYN: status dysraphicus.
arrhenic
Relating to arsenic. [G. arrhenikon (var.), arsenic]
Arrhenius
Svante, Swedish chemist and Nobel laureate, 1859–1927. See A. doctrine, A. equation, A. law, A.-Madsen theory.
arrhenoblastoma
SYN: Sertoli-Leydig cell tumor. [G. arrhen, male, + blastos, germ, + -oma, tumor]
arrhinencephaly, arrhinencephalia, arhinencephaly
Congenital absence or rudimentary state of the rhinencephalon, or olfactory lobe of the brain, on one or both sides, with a corresponding lack of development of the external ...
arrhinia
SYN: arhinia. [G. a- priv. + rhis (rhin-), nose]
Arrhythmia
An abnormal heart rhythm. In an arrhythmia the heartbeats may be too slow, too rapid, too irregular, or too early. Rapid arrhythmias (greater than 100 beats per minute) are called ...
Arrhythmia, sinus
The normal increase in heart rate that occurs during inspiration (when you breathe in). This is a natural response and is more accentuated in children than adults. The "sinus" ...
Arrhythmias, atrial
Abnormal heart rhythm due to electrical disturbances in the atria (the upper chambers of the heart) or the AV node "relay station", leading to fast heart beats. ...
Arrhythmias, rapid
Abnormally rapid heart rhythms, medically termed tachycardia.
Arrhythmias, slow
Abnormally slow heart rhythms, medically termed bradycardia.
Arrhythmias, ventricular
Abnormal rapid heart rhythms (arrhythmias) that originate in the lower chambers of the heart (the ventricles). Ventricular arrhythmias include ventricular tachycardia and ...
arrhythmic
Marked by loss of rhythm; pertaining to arrhythmia.
arrhythmogenic
Capable of inducing cardiac arrhythmias. [G. a- priv. + rhythmos, rhythm, + -gen, production]
arrowroot
The rhizome of Maranta arundinacea, a plant of tropical America, which is the source of a form of starch formerly used as a dietary supplement.
Arruga
Count Hermenegildo, Spanish ophthalmologist, 1886–1972. See A. forceps.
arsacetin
Formerly used as an antisyphilitic agent.
arsenamide
Used in the treatment of filariasis.
arsenate
A salt of arsenic acid.
arseniasis
Chronic arsenical poisoning. SYN: arsenicalism.
Arsenic
A metallic element that forms a number of poisonous compounds, arsenic is found in nature at low levels mostly in compounds with oxygen, chlorine, and sulfur. These are called ...
arsenic-fast
Resistant to the poisonous action of arsenic; denoting especially spirochetes and other protozoan parasites, which acquire resistance after repeated administration of the drug.
arsenic1
Denoting the element a. or one of its compounds, especially a. acid.
arsenical
1. A drug or agent, the effect of which depends on its arsenic content. 2. Denoting or containing arsenic.
arsenicalism
SYN: arseniasis.
arsenide
A compound of arsenic with a metal or other positively charged atoms or groups in which the arsenic is not bound to any atoms of oxygen. SYN: arseniuret.
arsenious
Arsenic (adj.).
arsenium
SYN: arsenic.
arseniuret
SYN: arsenide.
arsenotherapy
Therapeutic treatment with arsenic.
arsenous
1. Denoting a compound of arsenic with a valence of +3. 2. Arsenic (adj.).
arsenous acid
See arsenic trioxide.
arsenous hydride
SYN: arsine.
arsenous oxide
SYN: arsenic trioxide.
arsenoxides
Oxidation products in the body of arsphenamines; believed to be the agents active against spirochetes.
arsine
A cell and blood poison, many organic derivatives of which have been used in chemical warfare. SYN: arsenic trihydride, arseniureted hydrogen, arsenous hydride.
arsonic acid
A derivative of arsenic acid by replacement of a hydroxyl group by an organic radical.
arsonium
The positively charged ion, AsH4+; analogous to the ammonium ion, NH4+.
arsphenamine
Formerly used in the treatment of syphilis, yaws, and some other diseases of protozoan origin, after neutralization with NaOH. The synthesis of a. in 1907 and the demonstration ...
arsthinol
An amebicide.
ART (antiretroviral therapy)
Treatment that suppresses or stops a retrovirus. One of the retrovirus is the human immunodeficiency virus (HIV) that causes AIDS. Retroviruses are so named because they carry ...
artefact
See artifact.
artemether
Semisynthetic derivative of artemisinin used in the treatment of cerebral malaria.

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