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A genus of fungi (family Mucoraceae) commonly found in nature. Thermophilic species survive in compost piles at temperatures exceeding 45°C and may cause mucormycosis ( ...
Once a major medical hazard, absinthe is an emerald-green liqueur flavored with extracts of the wormwood plant, licorice and aromatic flavorings in a alcohol base. Absinthe ...
A bitter principle, C30H40O8, obtained from absinthium.
The dried leaves and tops of Artemisia a. (family Compositae). The infusion is now seldom used, but it has been used as a tonic; in large or frequently repeated doses it produces ...
SYN: thujone.
Unconditional; unlimited; uncombined; undiluted (as in case of alcohol); certain. [L. absolutus, complete, pp. of ab-solvo, to loosen from]
Absolute neutrophil count
The real number of white blood cells (WBCs) that are neutrophils. The absolute neutrophil count is commonly called the ANC. The ANC is not measured directly. It is derived by ...
1. To take in by absorption. 2. To reduce the intensity of transmitted light. [L. ab-sorbeo, pp. -sorptus, to suck in]
In spectrophotometry, log of the ratio of the radiant power of the incident radiation to the radiant power of the transmitted radiation. SYN: absorbancy, absorbency, ...
SYN: absorbance.
Absorbed dose
In radiology, the absorbed dose is the amount of energy that is deposited in any material by ionizing radiation. The unit of absorbed dose, the rad, is a measure of energy ...
1. Causing absorption. 2. Any substance possessing such quality. [L. ab-sorbeo, to suck in, + facio, to make]
SYN: absorbance.
1. Having the power to absorb, soak up, or take into itself a gas, liquid, light rays, or heat. SYN: absorptive, bibulous. 2. Any substance possessing such power. 3. Material ...
absorber head
Portion of a rebreathing anesthesia circuit that contains carbon dioxide absorbent; often referred to as a canister.
1. The taking in, incorporation, or reception of gases, liquids, light, or heat. Cf.:adsorption. 2. In radiology, the uptake of energy from radiation by the tissue or medium ...
SYN: absorbent (1).
1. SYN: specific absorption coefficient. 2. SYN: molar absorption coefficient. 3. The ability of a material to absorb electromagnetic radiation. - molar a. SYN: molar ...
Marked by restraint, especially in the consumption of food or alcohol. From the Latin prefix "abs-," meaning "from" or "away," and the Latin noun "temetum," meaning ...
Refraining from the use of certain articles of diet, alcoholic beverages, illegal drugs, or from sexual intercourse. [L. abs-tineo, to hold back, fr. teneo, to hold]
Abstinence, periodic
Also known as fertility awareness, natural family planning, and the rhythm method, this approach entails not having sexual intercourse on the days of a woman's menstrual ...
1. A preparation made by evaporating a fluid extract to a powder and triturating with milk sugar. 2. A condensation or summary of a scientific or literary article or address. ...
1. Distillation or separation of the volatile constituents of a substance. 2. Exclusive mental concentration. 3. The making of an abstract from the crude drug. 4. ...
In fungi, the formation of asexual spores by cutting off portions of the sporophore through the growth of dividing partitions. [L. ab-, from, + strictura, a contraction]
In a direction away from the end and toward the center; denoting the course of an electrical current in a muscle. [L. ab, from, + terminus, end]
1. Loss or impairment of the ability to perform voluntary actions or to make decisions. 2. Reduction in speech, movement, thought, and emotional reaction; a common result of ...
Relating to, or suffering from, abulia.
The average number of types of macromolecules ( e.g., mRNAs) per cell.
1. Misuse, wrong use, especially excessive use, of anything. 2. Injurious, harmful, or offensive treatment, as in child a. or sexual a. - child a. the psychological, emotional, ...
Abuse, child
1. Child abuse is a very complex and dangerous set of problems that include child neglect and the physical, emotional, and sexual abuse of children. Child neglect is the most ...
Abuse, elder
The physical, sexual, or emotional abuse of an elderly person, usually one who is disabled or frail. Like child abuse, elder abuse is a crime that all health and social services ...
Abuse, emotional child
Emotional child abuse is the third most frequently reported form of child abuse (after child neglect and physical child abuse), accounting 17% of all cases of child abuse. ...
Abuse, physical child
Next to child neglect, physical abuse is the second most frequently reported form of child abuse, accounting for 25% of all cases of child abuse. Physical child abuse is ...
Abuse, pregnancy
Abuse of an expectant mother. This abuse is most often perpetrated by the woman's spouse, partner, or relative. Spurts of temper can progress to shouting and name calling. Then ...
Abuse, psychological child
Also known as emotional child abuse, this is the third most frequently reported form of child abuse (after child neglect and physical child abuse), accounting 17% of all ...
Abuse, sexual child
Child abuse comprises four basic types of mistreatment: child neglect, physical abuse of a child, emotional abuse of a child, and sexual abuse of a child. Sexual abuse is the ...
Abuse, steroid
Use of substances containing anabolic steroids to increase muscle mass. Such steroids can have many side effects when misused, including psychiatric problems, liver tumors, ...
Abuse, verbal child
Also known as emotional child abuse, this is the third most frequently reported form of child abuse (after child neglect and physical child abuse), accounting 17% of all ...
In dentistry, a natural tooth or implanted tooth substitute, used for the support or anchorage of a fixed or removable prosthesis. - auxiliary a. a tooth other than the one ...
Abbreviation for a chemotherapy regimen of Adriamycin (doxorubicin), bleomycin, vinblastine, and dacarbazine; used to treat neoplastic diseases, such as Hodgkin lymphoma.
The CGS electromagnetic unit of difference of potential equal to 10−8 V. The potential difference between two points such that 1 erg of work will be done when 1 abcoulomb of ...
SYN: catalytic antibody. [antibody + enzyme]
Abbreviation for alternating current.
Symbol for actinium; acetyl.
Symbol for arabinosylcytosine.
AC joint
The AC (acromioclavicular) joint is located between the acromion (a projection of the scapula that forms the point of the shoulder) and the clavicle (the collar bone). This is ...
Abbreviation for accommodative convergence- accommodation ratio.
The dried gummy exudation from A. senegal and other species of A. (family Leguminosae), prepared as a mucilage and syrup; used as an emollient, demulcent excipient, and ...
A form of aphasia characterized by the inability to perform simple mathematical problems; found with lesions of various areas of the cerebral hemispheres, and often an early sign ...
Rarely used term for stiffening or rigidity of a joint for any reason. [G. a- priv. + kampto, to bend]
See acantho-.
1. A spine or spinous process. 2. The spinous process of a vertebra. [G. akantha, a thorn]
Infection by free-living soil and water amebae of the genus Acanthamoeba that may result in a necrotizing dermal or tissue invasion, a fulminating and usually fatal primary ...
A microscopic organism, an amoeba, found in soil, dust and fresh water (lakes, rivers, hot springs and hot tubs). Acanthamoeba also occur in brackish water and sea water as well ...
An intermediate larva stage of Acanthocephala, formed within the arthropod host; a preinfective, nonencysted stage leading to the infective cystacanth. [G. akantha, thorn, ...
Paresthesia of a pinprick. [G. akantha, thorn, + aisthesis, sensation]
Acanthia lectularia
Early name for Cimex lectularius. [G. akantha, thorn, prickle; L. lectus, a bed]
The tip of the anterior nasal spine. SYN: akanthion. [G. akantha, thorn]
A spinous process; spiny, thorny. [G. akantha, a thorn, the backbone, the spine, fr. ake, a point, + anthos, a flower]
The thorny-headed worms, a phylum (formerly considered a class) of obligatory parasites without an alimentary canal, characterized by an anterior introvertible spiny proboscis. ...
An illness caused by infection with a species of Acanthocephala.
A genus of filarial worms parasitic in man, now considered part of the genus Mansonella. [ acantho- + G. cheilos, lip, + nema, thread]
An erythrocyte characterized by multiple spiny cytoplasmic projections, as in acanthocytosis. [ acantho- + G. kytos, cell]
A rare condition in which the majority of erythrocytes are acanthocytes; a regular feature of abetalipoproteinemia; also sometimes present in severe hepatocellular disease. SYN: ...
Separation of individual epidermal keratinocytes from their neighbor, as in conditions such as pemphigus vulgaris and Darier disease. [ acantho- + G. lysis, loosening]
A tumor formed by proliferation of epithelial squamous cells. SEE ALSO: keratoacanthoma. [ acantho- + G. -oma, tumor] - clear cell a. a small sharply demarcated benign epidermal ...
Toothlike pseudopodia observed in some amebae, typically in members of the genus Acanthamoeba. [ acantho- + G. pous, podos, foot]
The spindle-shaped embryo, with rostellar hooks and body spines, formed within the egg shell of Acanthocephala; this stage burrows into the body cavity of its first intermediate ...
An increase in the thickness of the stratum spinosum of the epidermis. [ acantho- + G. -osis, condition] - glycogenic a. elevated gray-white plaques of distal esophageal or ...
Pertaining to or characteristic of acanthosis.
Obsolete term for acanthocyte.
Obsolete term for acanthocytosis. SYN: acanthocytosis.
Less than the normal level of carbon dioxide in the blood. The opposite of hypercapnia. The origin of the word “acapnia” is curious. It comes from the Greek “a-“ meaning ...
An oligosaccharide alpha-glucosidase inhibitor; adjunctive therapy in type 2 diabetes mellitus to blunt postprandial hyperglycemia.
Congenital absence of the heart; a condition sometimes occurring in one member of monozygotic twins or in one member of conjoined twins when pair partner monopolizes the placental ...
Without a heart.
A twin without a heart that remains viable by using the placental circulation of its mate. - a. acephalus acephalocardius; an acardiac conceptus in which the head and ...
Any disease caused by mites, usually a skin infestation. See mange. - psoroptic a. infestation of mammalian skin with Psoroptes mites. - sarcoptic a. infestation of skin ...
An agent that kills acarines; commonly used to denote chemicals that kill ticks. [Mod. L. acarus, a mite, fr. G. akari + L. caedo, to cut, kill]
A general term for a member of the family Acaridae or for a mite. SYN: acaridan. [G. akari, mite]
A family of the order Acarina, a large group of exceptionally small mites, usually 0.5 mm or less, abundant in dried fruits and meats, grain, meal, and flour; frequently a cause ...
SYN: acarid.
An order of Arachnida that includes the mites and ticks. [G. akari, a mite]
A member of the order Acarina.
A skin inflammation or eruption produced by a mite. [G. akari, mite, + derma (dermat-), skin] - a. urticarioides infestation with the grain itch mite, Pyemotes ventricosus. See ...
Resembling a mite. [G. akari, mite, + eidos, resemblance]
The study of acarine parasites, the ticks and mites, and the diseases they transmit. [G. akari, mite, + logos, study]
Morbid fear of small parasites, small particles, or of itching. [G. akari, mite, + phobos, fear]
A genus of mites of the family Acaridae. [G. akari, mite] - A. balatus a tropical species of mite that causes a particularly severe type of scabies-like irritation. - A. ...
SYN: akaryocyte.
SYN: acatalasia.
Absence or deficiency of catalase from blood and tissues, often manifested by recurrent infection or ulceration of the gums and related oral structures and caused by mutations in ...
Rarely used term relating to acathexia.
Rarely used term for an abnormal release of secretions. [G. a- priv. + kathexis, retention]
Rarely used term for a mental disorder in which certain objects or ideas fail to arouse an emotional response in the individual. [G. a- priv. + kathexis, retention]
SYN: akathisia.
acaudal, acaudate
Having no tail. [G. a- priv. + L. cauda, tail]
Abbreviation for anodal closure contraction.
1. Accelerating. 2. Obsolete term for an accelerator (sympathetic) nerve to the heart. [L. accelerator]
SYN: accelerator (3).
1. The act of accelerating. 2. The rate of increase in velocity per unit of time; commonly expressed in g units; also expressed in centimeters or feet per second squared. 3. The ...
1. Anything that increases rapidity of action or function. 2. In physiology, a nerve, muscle, or substance that quickens movement or response. 3. A catalytic agent used to ...
Obsolete term for what was once considered an intermediary product of coagulation but is no longer thought to exist.
An instrument for measuring the rate of change of velocity per unit of time.
A substance, such as aniline, the presence of which allows a combination between a tissue or histologic element and a stain that might otherwise be impossible. [L. accentus, ...
1. A compound that will take up a chemical group ( e.g., an amine group, a methyl group, a carbamoyl group) from another compound (the donor); under the action of alanine ...
accès pernicieux
A series of severe attacks of falciparum malaria, sometimes occurring in apparently mild cases; roughly classified as cerebral and algid. [Fr., pernicious attacks or symptoms]
A way or means of approach or admittance. In dentistry : 1. The space required for visualization and for manipulation of instruments to remove decay and prepare a tooth for ...
SYN: accessory. [L.] - a. willisii SYN: accessory nerve [CN XI].
In anatomy, denoting certain muscles, nerves, glands, etc. that are auxiliary or supernumerary to some similar, generally more important thing. SYN: accessorius. [L. ...
Accessory nerve
The accessory nerve is the eleventh cranial nerve. All twelve cranial nerves, the accessory nerve included, emerge from or enter the skull (the cranium) as opposed to the spinal ...
Accessory neuropathy
Disease of the accessory nerve which is the eleventh cranial nerve. All twelve cranial nerves, the accessory nerve included, emerge from or enter the skull (the cranium) as ...
Accessory placenta
An extra placenta separate from the main placenta. Also called a succenturiate or supernumerary placenta. The placenta is the organ joining the mother and fetus, the organ that ...
An unplanned or unintended but sometimes predictable event leading to injury, e.g., in traffic, industry, or a domestic setting, or such an event developing in the course of a ...
1. Having a greater number of accidents than would be expected of the average person in similar circumstances. 2. Having personality characteristics predisposing one to ...
SYN: acclimatization.
Physiological adjustment of an individual to a different climate, especially to a change in environmental temperature or altitude. SYN: acclimation.
Acclimatization to altitude
The main cause of altitude sickness is going too high too fast. Given time, the body can adapt to the decrease in oxygen concentration at a specific altitude, process known as ...
In medicine, the ability of the eye to change its focus from distant to near objects (and vice versa). This process is achieved by the lens changing its shape. Accommodation is ...
Relating to accommodation.
A bacterium that accompanies the main infecting agent in a mixed infection and that influences the virulence of the main organism. [M.E., fr. O.Fr., fr. L. comples, closely ...
Childbirth, particularly parturition. SEE ALSO: birth. [Fr. from coucher, to lie down] - a. forcé (for-sa′) forced, artificially hastened delivery, by means of forceps, ...
French for a male obstetrician, a physician skilled in the art and science of managing pregnancy, labor and the puerperium (the time after delivery). * * * Obsolete term for ...
French for a woman who is an obstetrician (a physician skilled in the art and science of managing pregnancy, labor and the time after delivery) or a midwife (today a ...
1. Reproduction by budding or germination. 2. SYN: accretion (1). [L. accresco, pp. -cretus, to increase]
accretio cordis
Adhesion of the pericardium to adjacent extracardiac structures.
1. Increase by addition to the periphery of material of the same nature as that already present; e.g., the manner of growth of crystals. SYN: accrementition (2). 2. In ...
Intermittent synchronization of two different rhythms of the heart with one influencing the behavior of the other when neither is dominant; seen in cases of atrioventricular ...
The degree to which a measurement, or an estimate based on measurements, represents the true value of the attribute that is being measured. In the laboratory, a. of a test is ...
Abbreviation for acid-citrate-dextrose.
Abbreviation for angiotensin-converting enzyme.
ACE (angiotensin converting enzyme)
The angiotensins are peptides (substances smaller than proteins) that act as vasoconstricting agents (causing blood vessels to narrow). Narrowing the diameter of the blood vessels ...
ACE inhibitor
A drug that inhibits ACE (angiotensin converting enzyme) which is important to the formation of angiotensin II. Angiotensin II causes arteries in the body to constrict and ...
A β-adrenergic blocking agent.
A cholinergic drug used for topical therapy of glaucoma.
A derivative of dapsone with a longer duration of action; used to enhance the malaria chemoprophylaxis of quinine or of a combination of chloroquine-primaquine, and believed to ...
Obsolete term for a mental syndrome, the chief features of which are listlessness, carelessness, apathy, and melancholia.
acefylline piperazine
A diuretic and smooth muscle relaxant.
Abbreviation for angiotensin-converting enzyme inhibitors, under inhibitor.
1. Devoid of cells. SYN: noncellular (2). 2. A term applied to unicellular organisms that do not become multicellular and are complete within a single cell unit; frequently ...
Absence of a true celom or body cavity lined with mesothelium; typically found in Platyhelminthes (flatworms), which have a syncytial mass of parenchymal cells instead of a ...
acelomate, acelomatous
Not having a celom or body cavity.
SYN: acenocoumarol.
An orally effective synthetic anticoagulant of the coumarin type, with similar actions. SYN: acenocoumarin, nicoumalone.
Lacking a center; in cytogenetics, denoting a chromosome fragment without a centromere. [G. a- priv. + kentron, center]
Acentric chromosome
A fragment of a chromosome (one of the microscopically visible carriers of the genetic material DNA) that is lacking a centromere (the “waist” of the chromosome essential for ...
acephalia, acephalism
1. SYN: acephaly. 2. SYN: acephalus.
Denoting members of the protozoan suborder Acephalina (order Eugregarinida), characterized by simple noncompartmentalized bodies, that parasitize invertebrates.
SYN: abrachiocephaly. [G. a- priv. + kephale, head, + brachion, arm]
Absence of head and heart as seen in a parasitic twin. [G. a- priv. + kephale, head, + kardia, heart]
acephalocheiria, acephalochiria
Congenital absence of head and hands. [G. a- priv. + kephale, head, + cheir, hand]
A hydatid cyst with no daughter cyst; a sterile hydatid, so called because it fails to develop scoleces (tapeworm heads). [G. a- priv. + kephale, head, + kystis, bladder]
Congenital absence of head, thorax, and abdomen as seen in a parasitic twin with pelvis and legs only.
Congenital absence of head and feet. [G. a- priv. + kephale, head, + pous, foot]
Congenital absence of head and vertebral column. [G. a- priv. + kephale, head, + rhachis, spine]
Congenital absence of head and thorax. [G. a- priv. + kephale, head, + thorax, chest]
A headless fetus. SYN: acephalia (2), acephalism. [G. a- priv. + kephale, head] - a. acormus (a-kor′mus) condition in which a head without a body is attached to the placenta by ...
Congenital absence of the head. SYN: acephalia (1), acephalism. [G. a- priv. + kephale, head]
Fruit of a bushy tree that grows in Central and South America and Puerto Rico. The berry is the richest known source of vitamin C (ascorbic acid).
SYN: corpora arenacea, under corpus. [Mod. L. dim. of L. acervus, a heap]
Exuberant granulations that form a cicatrix. [G. akestos, curable, + -oma, tumor]
A synthetic, noncaloric sweetener similar to saccharin.
acet-, aceto-
Combining forms denoting the two-carbon fragment of acetic acid.
Plural of acetabulum.
Pertaining to the acetabulum, the cup-shaped socket of the hip joint which is a key feature of the pelvis. The head (upper end) of the femur (the thighbone) fits into the ...
Acetabular labrum
A ring of fibrocartilage (fibrous cartilage) that runs around the acetabulum (cup) of the hip joint and increases its depth. The head of the femur (the bone in the thigh) fits ...
Excision of the acetabulum. [ acetabulum + G. ektome, excision]
Any operation aimed at restoring the acetabulum to as near a normal state as possible. [ acetabulum + G. plastos, formed]
The cup-shaped socket of the hip joint. In fact, in Latin an “acetabulum” is cup, a vinegar cup. The acetabulum is a feature of the pelvis. The head (upper end) of the femur ...
Product of the addition of 2 mol of alcohol to one of an aldehyde, thus : RCHO + 2R′OH → RCH(OR′)2 + H2O; in mixed acetals ( e.g., glycosides), two different alcohols are ...
An intermediate in yeast fermentation of carbohydrate and in alcohol metabolism. It is a central agent for the toxic effects of ethanol. SYN: acetic aldehyde, ethanal. - ...
CH3CONH2; used in biomedical research. SYN: acetic amide.
A non-aspirin analgesic, acetaminophen may be given alone to relieve pain and inflammation. It may also be combined with other drugs, as in the migraine medication fioricet, ...
Used as an analgesic, antipyretic, and intestinal antiseptic. SYN: phenetsal.
SYN: acetarsone.
Used in the treatment of amebiasis, and as a local application in Vincent angina and in trichomoniasis vaginitis. The diethylamine salt is used as an antisyphilitic. SYN: ...
A salt or ester of acetic acid. - active a. SYN: acetyl-CoA. - a. kinase [EC] a phosphotransferase forming acetyl phosphate and ADP from ATP and a.. An important enzyme ...
acetate-CoA ligase
SYN: acetyl-CoA ligase.
The heterocyclic sulfonamide, 5-acetylamido-1,3,4-thiadiazole-2-sulfonamide, which inhibits the action of carbonic anhydrase in the kidney, increasing the urinary excretion of ...
SYN: ethynyl.
1. Denoting the presence of the two-carbon fragment of a. acid. 2. Relating to vinegar; sour. [L. acetum, vinegar]
acetic acid
A product of the oxidation of ethanol and of the destructive distillation of wood; used locally as a counterirritant and occasionally internally, and also as a reagent; ...
acetic aldehyde
SYN: acetaldehyde.
acetic amide
SYN: acetamide.
A side chain of molecules with a special affinity for the acetic acid radical. [L. acetum, vinegar, + capio, to take]
To cause acetic fermentation; to make vinegar or become vinegar. [L. acetum, vinegar, + facio, to make; or fieri, to be made, to become]
An apparatus for determining the content of acetic acid in vinegar or other fluid. SYN: acetometer. [L. acetum, vinegar, + G. metron, measure]
See acet-.
A salt or ion of acetoacetic acid. A ketone body formed in ketogenesis. SYN: diacetate (1). - a. decarboxylase [EC] a carboxy-lyase cleaving CO2 from a. to form ...
acetoacetic acid
One of the ketone bodies, formed in excess and appearing in the urine in starvation or diabetes.
Intermediate in the oxidation of fatty acid s and in the formation of ketone bodies; also formed from two molecules of acetyl-CoA; major role is condensation with acetyl-CoA ...
acetoacetyl-coenzyme A
SYN: acetoacetyl-CoA.
acetoacetyl-succinic thiophorase
SYN: 3-oxoacid-CoA transferase.
An oral hypoglycemic agent that stimulates pancreatic insulin secretion; most useful therapeutically in mild cases of non-insulin-dependent diabetes mellitus.
acetohydroxamic acid
An inhibitor of urease, used as adjunctive therapy in chronic urea-splitting urinary infections.
A condensation product of two molecules of acetaldehyde.
SYN: acetate kinase.
Obsolete term for 1-hydroxy-2-propanone, or hydroxyacetone; also used as a proprietary name for certain commercial items.
Decomposition of an organic compound with the addition of the elements of acetic acid at the point of decomposition; analogous to hydrolysis and phosphorolysis.
SYN: menadiol diacetate.
SYN: acetimeter.
In the body, a chemical that is formed when the body uses fat instead of glucose (sugar) for energy. The formation of acetone means that cells lack insulin or cannot effectively ...
The presence of acetone or acetone bodies in relatively large amounts in the blood, manifested at first by erethism, and later by a progressive depression. [ acetone + G. haima, ...
Relating to or caused by acetonemia.
Methyl cyanide; a colorless fluid of aromatic odor, soluble in water and alcohol.
Excretion in the urine of large amounts of acetone, an indication of incomplete oxidation of large amounts of lipids; commonly occurs in diabetic acidosis. [ acetone + G. ...
acetophenazine maleate
A phenothiazine tranquilizer.
SYN: phenacetin.
acetosulfone sodium
A leprostatic administered orally.
Relating to vinegar; sour-tasting.
Blanching of skin or mucous membranes after application of 3–5% acetic acid solution, a sign of increased cellular protein and increased nuclear density; used particularly on ...
acetrizoate sodium
Salt of 3-acetamido-2,4,6-triiobenzoic acid, a formerly used water-soluble radiographic contrast medium.
SYN: vinegar. [L. vinum a., soured wine, vinegar]
USAN-approved contraction for N-acetylglycinate, CH3CONHCH2COO-.
CH3CO–; an acetic acid molecule from which the hydroxyl group has been removed. - a. chloride a colorless liquid used as a reagent; also corrosive, causing severe burns ...
acetyl sulfisoxazole
A derivative of sulfisoxazole with the same actions and uses; an antibacterial sulfa drug.
Condensation product of coenzyme A and acetic acid, symbolized as CoAS∼COCH3; intermediate in transfer of two-carbon fragment, notably in its entrance into the tricarboxylic ...
acetyl-coenzyme A
SYN: acetyl-CoA.
Mixed anhydride between the carboxyl group of acetic acid and the phosphoric residue of adenosine 5′-monophosphoric acid.
Any enzyme catalyzing acetylation or deacetylation, as in the formation of N-acetylglutamate from glutamate plus acetyl-CoA, or the reverse; acetylases are usually called ...
Formation of an acetyl derivative.
A sedative replaced by benzodiazepines and newer drugs.
The acetic ester of choline, the neurotransmitter substance at cholinergic synapses, which causes cardiac inhibition, vasodilation, gastrointestinal peristalsis, and other ...
The cholinesterases that hydrolyze acetylcholine to acetate and choline within the central nervous system and at peripheral neuroeffector junctions ( e.g., motor endplates and ...
A mucolytic agent that reduces the viscosity of mucous secretions; used to prevent liver injury produced by acetaminophen toxicity.
The α-acetyl ester of digitoxin derived from lanatoside A, having the same actions and uses as digitoxin, but more rapid onset and shorter duration of action.
A digitalis glycoside with properties similar to those of digoxin; derived from digilanide C.
An opioid analgesic which exists in 4 different optical isomers. The l isomers are active and l-a. (LAM) has a long duration of action and has been tried as a substitute for ...
acetylornithine deacetylase
An enzyme catalyzing the hydrolysis of N2-acetyl-l-ornithine to l-ornithine and acetate.
acetylsalicylic acid
SYN: aspirin.
Acetylsalicylic acid (aspirin)
Aspirin is a good example of a tradename that has entered into the language. Aspirin was once the Bayer trademark for acetylsalicylic acid. On Aug. 10, 1897 young Bayer ...
acetyltannic acid
An astringent formerly used for treatment of diarrhea. SYN: diacetyltannic acid, tannylacetate.
Any enzyme transferring acetyl groups from one compound to another. SEE ALSO: acetyl-CoA a., choline a., dihydrolipoamide S-a.. SYN: transacetylase.
AcG, ac-g
Abbreviation for accelerator globulin.
See ACH.
ACH, Ach
Abbreviation for acetylcholine.
Failure to relax; referring especially to visceral openings such as the pylorus, cardia, or any other sphincter muscles. [G. a- priv. + chalasis, a slackening] - a. of the cardia ...
Emile C., French physician, 1860–1941. See A. syndrome, A.-Thiers syndrome.
A dull, poorly localized pain, usually one of less than severe intensity. - bone a. a dull pain in one or more bones, often severe; an extreme variety occurs in dengue. - stomach ...
Congenital absence of the lips. [G. a- priv. + cheilos, lip]
acheilous, achilous
Characterized by or relating to acheilia.
1. Congenital absence of one or both hands. 2. Anesthesia in, with loss of the sense of possession of, one or both hands. 3. A form of dyscheiria in which the patient is unable ...
acheiropody, achiropody
Congenital absence of the hands and feet; autosomal recessive inheritance. [G. a- priv. + cheir, hand, + podos, foot]
acheirous, achirous
Characterized by or relating to acheiria (1).
Walter, 20th century German internist. See A. syndrome.
Mythical Greek warrior, vulnerable only in the heel. See A. bursa, A. reflex, A. tendon.
Achilles tendon
A tough sinew that attaches the calf muscle to the back of the heel bone. The Achilles tendon is one of the longest tendons in the body. It is also formally called the tendo ...
Achilles tendonitis
Inflammation in the tendon of the calf muscle where it attaches to the heel bone. Achilles tendonitis causes pain at the back of the leg near the heel. Achilles tendonitis can ...
Pain due to inflammation of the bursa associated with the Achilles tendon. . The Achilles tendon is one of the better known anatomic features in sports medicine due to the ...
Pain due to inflammation of the Achilles tendon or the bursa associated with it. The Achilles tendon is one of the better known anatomic features in sports medicine due to the ...
Cutting the Achilles tendon. [ Achilles (tendon) + G. tenon, tendon, + tome, a cutting]
Not chiral; denoting an absence of chirality. [G. a- priv. + cheir, hand]
Absence of hydrochloric acid from the gastric juice. [G. a- priv. + chlorhydric (acid)]
Without chlorophyll, as in fungi.
A genus of bacteria (order Mycoplasmatales) that have characteristics identical to those of the species in the genus Mycoplasma, with the exception that the acholeplasmas do not ...
Suppressed or absent secretion of bile. [G. a- priv. + chole, bile]
Without bile, as in a. (pale) stools.
Absence of bile pigments from the urine in certain cases of jaundice. [G. a- priv. + chole, bile, + ouron, urine]
Without bile in the urine.
Neonatal lethal dwarfism characterized by severe bone dysplasia of all four limbs, micromelia, enlarged skull, and a short trunk with delayed or absent ossification of the ...
The most common form of short stature with disproportionately short limbs — dwarfism with short arms and legs. Achondroplasia is caused by mutation in the fibroblast growth ...
Relating to or characterized by achondroplasia.
Achoo syndrome
A disorder characterized by nearly uncontrollable paroxysms of sneezing provoked in a reflex fashion by the sudden exposure of a dark-adapted subject to intensely bright light, ...

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