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mondofacto - Online Medical Dictionary
Category: Health and Medicine > Medical Dictionary
Date & country: 26/01/2008, UK
Words: 116197
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pseudosphere<geometry> The surface of constant negative curvature generated by the revolution of a tractrix. This surface corresponds in non-Euclidian space to the sphere in ordinary space. An important property of the surface is that any figure drawn upon it can be displaced in any way without tearing it or altering in size any of its elements. ... Origi …
pseudostoma<biology> A group of cells resembling a stoma, but without any true aperture among them. ... (06 Mar 1998) ...
pseudostrabismusThe appearance of strabismus caused by epicanthus, abnormality in interorbital distance, or corneal light reflex not corresponding to the centre of the pupil. ... Origin: pseudo-+ G. Strabismos, a squinting ... (05 Mar 2000) ...
pseudostratified epitheliumAn epithelium that gives a superficial appearance of being stratified because the cell nuclei are at different levels, but in which all cells reach the basement membrane, hence it is classed as a simple epithelium. ... (05 Mar 2000) ...
pseudotabesA syndrome having the characteristics of tabetic neurosyphilis but not due to syphilis. ... Synonym: Leyden's ataxia, peripheral tabes, pseudoataxia. ... (05 Mar 2000) ...
pseudotrichinosisSynonym for multiple myositis ... The occurrence of multiple foci of acute inflammation in the muscular tissue and overlying skin in various parts of the body, accompanied by fever and other signs of systemic infection. ... See: dermatomyositis. ... Synonym: acute disseminated myositis, pseudotrichinosis, pseudotrichiniasis. ... (05 Mar 2000) ...
pseudotruncus arteriosusCongenital cardiovascular deformity with atresia of the pulmonic valve and absence of the main pulmonary artery; the lungs are supplied with blood either through a patent ductus or via bronchial arteries arising from the aorta. A characteristic of the most severe form of tetralogy of Fallot. ... (05 Mar 2000) ...
pseudotubercleA nodule histologically similar to a tuberculous granuloma, but due to infection by some microorganism other than Mycobacterium tuberculosis. ... (05 Mar 2000) ...
pseudotubercular yersiniosisSynonym for pseudotuberculosis ... A disease of a wide variety of animal species caused by the bacterium Yersinia pseudotuberculosis. Epizootics of pseudotuberculosis are commonly seen in birds and rodents, often with high case fatality rates. In man, seven clinical entities are recognised: primary focalised infections (pseudoappendicitis, acute mes …
pseudotuberculosisA disease of a wide variety of animal species caused by the bacterium Yersinia pseudotuberculosis. Epizootics of pseudotuberculosis are commonly seen in birds and rodents, often with high case fatality rates. In man, seven clinical entities are recognised: primary focalised infections (pseudoappendicitis, acute mesenteric lymphadenitis, or acute te …
pseudotubular degenerationA form of degeneration observed in adrenal glands, especially those of patients with febrile infectious disease; the shrunken, lipid-depleted cells of the zona fasciculata (and sometimes the zona glomerulosa) are arranged in a circular pattern about spaces that may be empty or partly filled with fibrin, necrotic cells, or amorphous material. ... (05 …
pseudotumour1. <oncology> An enlargement of nonneoplastic character which clinically resembles a true neoplasm so closely as to often be mistaken for such. ... 2. A condition, commonly associated with obesity in young females, of cerebral oedema with narrowed small ventricles but with increased intracranial pressure and frequently papilledema. ... Synonym: …
pseudotumour cerebri<radiology> Idiopathic, increased cerebrospinal fluid production, increased intracranial pressure, papilledema, CT: slit-like ventricles, treatment: steroids ... (12 Dec 1998) ...
pseudoturbinalSynonym for turbinal ... <anatomy> Rolled in a spiral; scroll-like; turbinate; applied to the thin, plicated, bony or cartilaginous plates which support the olfactory and mucous membranes of the nasal chambers. ... There are usually several of these plates in each nasal chamber. The upper ones, connected directly with the ethmoid bone, are call …
pseudounimolecular<biochemistry> Referring to a reaction whose rate appears to be dependent on the concentration of only one substrate; usually due to a constant, saturating level of the other compounds. ... Synonym: pseudomonomolecular. ... (05 Mar 2000) ...
pseudounipolar cellSynonym for unipolar neuron ... A neuron whose cell body emits a single axonal process resulting from the fusion of two polar processes during development; at a variable distance from the cell body, the process divides into a peripheral axon branch extending outward as a peripheral afferent (sensory) nerve fibre, and a central axon branch that enter …
pseudounipolar neuronSynonym for unipolar neuron ... A neuron whose cell body emits a single axonal process resulting from the fusion of two polar processes during development; at a variable distance from the cell body, the process divides into a peripheral axon branch extending outward as a peripheral afferent (sensory) nerve fibre, and a central axon branch that enter …
pseudouridine<molecular biology> Unusual nucleotide found in some tRNA: glycosidic bond is associated with position 5' of uracil, not position 1'. ... (18 Nov 1997) ...
pseudouridine 746-32 synthase<enzyme> A dual-specificity pseudouridine synthase; forms both pseudouridine 746 in e. Coli 23s ribosomal RNA and pseudouridine 32 in tRNA(phe); has 219 aa; mw 24 kD ... Registry number: EC 5.4.99.- ... Synonym: 23s RNA pseudouridine 746 synthase, psi746 synthase, tRNA(phe) pseudouridine 32 synthase, psi32 synthase ... (26 Jun 1999) ...
pseudovacuole<cell biology> An apparent vacuole in a cell, either an artifact or an intracellular parasite. ... (05 Mar 2000) ...
pseudovariolaSynonym for alastrim ... A mild form of smallpox caused by a less virulent strain of the virus. ... Synonym: Cuban itch, Kaffir pox, milkpox, pseudosmallpox, pseudovariola, variola minor, West Indian smallpox, whitepox. ... Origin: Pg. Alastrar, to scatter over ... (05 Mar 2000) ...
pseudoventricleSynonym for cavity of septum pellucidum ... A slitlike, fluid-filled space of variable width between the left and right transparent septum, which occurs in less than 10% of human brains and may communicate with the third ventricle. ... Synonym: cavum septi pellucidi, Duncan's ventricle, fifth ventricle, pseudocele, pseudoventricle, sylvian ventricle, …
pseudovitamin<biochemistry> A substance having a chemical structure very similar to that of a given vitamin, but lacking the usual physiologic action. ... (05 Mar 2000) ...
pseudovitamin B12<biochemistry> Cobamide cyanide phosphate, 3'-ester with 7-alpha-d-ribofuranosyladenine, inner salt; vitamin B12 with adenine replacing dimethylbenzimidazole; one of several substances produced during anaerobic fermentation by certain organisms in bovine rumen contents; it is chemically closely similar to vitamin B12 (cyanocobalamin) but with …
pseudovivipary<plant biology> A condition in which vegetative propagules replace some or all of the normal sexual flowers in the inflorescence. ... (09 Oct 1997) ...
pseudovomiting<gastroenterology> Regurgitation of matter from the oesophagus or stomach without expulsive effort. ... (05 Mar 2000) ...
pseudoxanthoma cell<cell biology> Relatively large phagocytic cell's (macrophages) that contain numerous small lipid vacuoles or haemosiderin (or both), in organizing haemorrhagic or inflammatory lesions. ... (05 Mar 2000) ...
pseudoxanthoma elasticum<dermatology> A rare disorder of degeneration of the elastic fibres with tiny areas of calcification in the skin, back of the eyes (retinae), and blood vessels. ... Pseudoxanthoma elasticum is inherited from the parents, either as an autosomal recessive or as an autosomal dominant trait. It typically causes yellow-white small raised areas in t …
pseuodoparalysis, spasticBetter known as creutzfeldt-jakob disease. A dementing disease of the brain. It is believed due to an unconventional (not a bacteria or virus), transmissible agent called a prion. Symptoms of cjd include forgetfulness, nervousness, jerky trembling hand movements, unsteady gait, muscle spasms, chronic dementia, balance disorder, and loss of facial e …
psiPounds force of pressure per square inch. ... (05 Dec 1998) ...
psi factorA protein responsible for the specific initiation of the RNA polymerase-catalyzed reaction at the promoter sites of genes. ... (05 Mar 2000) ...
psi phenomenonA phenomenon that includes both psychokinesis and extrasensory perception; the extrasensory mental processes involved in the alleged ability to send or receive telepathic messages. ... (05 Mar 2000) ...
psiaPounds force of pressure per square inch absolute (including atmospheric pressure). ... (05 Dec 1998) ...
psicoseRibo-2-hexulose;a ketohexose; d-psicose is epimeric with d-fructose. ... Synonym: pseudofructose, ribo-2-hexulose. ... (05 Mar 2000) ...
psigPounds force of pressure per square inch gauge (excluding atmospheric pressure). ... (05 Dec 1998) ...
psilocin3-[2-(Dimethylamino)ethyl]indol-4-ol;a hallucinogenic agent related to psilocybin. ... (05 Mar 2000) ...
PsilocybeA genus of mushrooms (family Agaricaceae) containing many species with psychotropic or hallucinogenic properties, including Psilocybe mexicana, of which the fruiting bodies are a source of the hallucinogen, psilocybin. ... (05 Mar 2000) ...
psilocybin3-(2-dimethylamino)ethylindol-4-ol dihydrogen phosphate;the N',N' -dimethyl derivative of 4-hydroxytryptamine; obtained from the fruiting bodies of the fungus Psilocybe mexicana and other species of Psilocybe and Stropharia. Psilocybin is a congener of 5-hydroxytryptamine, with striking central nervous system effects, and is readily hydrolyzed to 4 …
psilocybine<chemical> The major of two hallucinogenic components of teonanacatl, the sacred mushroom of mexico, the other component being psilocin. ... Pharmacological action: hallucinogens. ... Chemical name: 1H-Indol-4-ol, 3-(2-(dimethylamino)ethyl)-, dihydrogen phosphate (ester) ... (12 Dec 1998) ...
psilosisFalling out of the hair. ... Origin: G. Psilosis, a stripping, fr. Psilos, bare ... (05 Mar 2000) ...
psilothinA depilatory plaster applied when warm to a hairy surface, and ripped off when cool, causing removal of the hairs. ... Origin: see psilosis ... (05 Mar 2000) ...
psilotic1. Relating to psilosis. ... Synonym: epilatory. ... (05 Mar 2000) ...
psittacineReferring to birds of the parrot family (parrots, parakeets, and budgerigars). ... (05 Mar 2000) ...
psittacosis<chest medicine, disease> Psittacosis is primarily an infectious disease of birds caused by the bacterium Chlamydia psittaci. Transmission from infected birds results in a relatively rare febrile illness characterised by pneumonia and systemic symptoms. A flu-like illness can also occur. Almost any bird can harbor this bacterium in their excr …
psittacosis inclusion bodiesIntracytoplasmic chlamydial microcolonies observed in bronchial epithelial cells infected with Chlamydia psittaci. ... (05 Mar 2000) ...
psittacosis virusFormer name for Chlamydia psittaci. ... (05 Mar 2000) ...
psoas abscessAbscess of the psoas muscle resulting usually from disease of the lumbar vertebrae, with the pus descending into the muscle sheath. The infection is most commonly tuberculous or staphylococcal. ... (12 Dec 1998) ...
psoas major<anatomy, muscle> Origin, bodies of vertebrae and intervertebral disks from the twelfth thoracic to the fifth lumbar, and transverse processes of the lumbar vertebrae; insertion, forms a common insertion with iliacus muscle into lesser trochanter of femur; action, flexes hip joint; nerve supply, lumbar plexus (ventral rami of first, second an …
psoas marginIn abdominal radiography, the appearance of the fat stripe delineating the lateral margin of the psoas muscle shadow; shows a normal retroperitoneum when visible. ... (05 Mar 2000) ...
psoas minor muscle<anatomy> An inconstant muscle, absent in about 40%; origin, bodies of twelfth thoracic and first lumbar vertebrae and disk between them; insertion, iliopubic eminence via iliopectineal arch (iliac fascia); action, assists in flexion of lumbar spine; nerve supply, lumbar plexus. ... Synonym: musculus psoas minor, smaller psoas muscle. ... (05 M …
psoas musclesA powerful flexor of the thigh at the hip joint (psoas major) and a weak flexor of the trunk and lumbar spinal column (psoas minor). Psoas is derived from the greek 'psoa', the plural meaning 'muscles of the loin'. It is a common site of infection manifesting as abscess (psoas abscess). The psoas muscles and their fibres are also used frequently in …
psomophagiaPsomophagy ... The practice of swallowing the food without thorough mastication. ... Origin: G. Psomos, morsel, bit, + phago, to eat ... (05 Mar 2000) ...
psoralen<pharmacology> Drug capable of forming photoadducts with nucleic acids if irradiated with ultraviolet light. ... (06 Oct 1997) ...
psoralen synthase<enzyme> Nadph-dependent cytochrome p-450 monooxygenase which converts (+) marmesin by initial hydroxylation at c3', followed by release of water, acetone and psoralen ... Registry number: EC 1.14.13.- ... Synonym: psoralen 5-monooxygenase ... (26 Jun 1999) ...
psoralens<chemical> Substances found in many different plants, especially psoralea corylifolia (legume). They are used for skin diseases, especially vitiligo and as sunscreens. They interact with nucleic acids and are also used as research tools. Psoralens have a coumarin molecule with a furan ring. ... Pharmacological action: dermatologic agents, phot …
psorelcosisUlceration resulting from scabies of the skin. ... Origin: G. Psora, itch, + helkosis, ulceration ... (05 Mar 2000) ...
psorenteritisInflammatory swelling of the solitary lymphatic follicles of the intestine. ... Origin: G. Psora, itch (scabies), + enteron, intestine, + -itis, inflammation ... (05 Mar 2000) ...
PsorergatesA genus of itch mites (family Cheyletidae) parasitic on cattle, sheep, and goats. Psorergates bos is the itch mite of cattle, described in New Mexico; Psorergates ovis is the small itch mite of sheep in the U.S., Australia, New Zealand, and South Africa. ... Origin: G. Psora, itch ... (05 Mar 2000) ...
psoriasicSynonym for psoriatic ... Relating to psoriasis. ... Synonym: psoriasic. ... (05 Mar 2000) ...
psoriasiformResembling psoriasis. ... (05 Mar 2000) ...
psoriasis<dermatology> A common chronic, squamous dermatosis, marked by exacerbations and remissions and having a polygenic inheritance pattern. The most distinctive histological findings in well developed psoriasis are Munro microabscesses and spongiform pustules. ... It is characterised clinically by the presence of rounded, circumscribed, erythemato …
psoriasis annularisSynonym for psoriasis circinata ... Psoriasis in which healing is taking place at the centre of the lesion while the process continues at the periphery, producing a ring-shaped or annular lesion. ... Synonym: psoriasis annularis, psoriasis annulata, psoriasis orbicularis. ... (05 Mar 2000) ...
psoriasis arthropicaPsoriasis associated with severe arthritis resembling rheumatoid arthritis, although serum rheumatoid factor is absent. ... (05 Mar 2000) ...
psoriasis circinataPsoriasis in which healing is taking place at the centre of the lesion while the process continues at the periphery, producing a ring-shaped or annular lesion. ... Synonym: psoriasis annularis, psoriasis annulata, psoriasis orbicularis. ... (05 Mar 2000) ...
psoriasis diffusaDiffused psoriasis, a form of psoriasis with extensive coalescence of the lesions. ... (05 Mar 2000) ...
psoriasis discoideaPsoriasis in which the lesions are discrete and disklike. ... Synonym: psoriasis nummularis. ... (05 Mar 2000) ...
psoriasis geographicaPsoriasis gyrata in which the lesions suggest the coast outline on a map. ... (05 Mar 2000) ...
psoriasis guttataPsoriasis occurring abruptly in round patches of small size; seen in young persons following streptococcal infections. ... (05 Mar 2000) ...
psoriasis gyrataPsoriasis circinata in which there is a coalescence of the rings giving rise to figures of various outlines. ... (05 Mar 2000) ...
psoriasis inveterataPsoriasis in which the lesions are confluent, the affected skin being thickened, indurated, and scaly. ... (05 Mar 2000) ...
psoriasis nummularisSynonym for psoriasis discoidea ... Psoriasis in which the lesions are discrete and disklike. ... Synonym: psoriasis nummularis. ... (05 Mar 2000) ...
psoriasis orbicularisSynonym for psoriasis circinata ... Psoriasis in which healing is taking place at the centre of the lesion while the process continues at the periphery, producing a ring-shaped or annular lesion. ... Synonym: psoriasis annularis, psoriasis annulata, psoriasis orbicularis. ... (05 Mar 2000) ...
psoriasis ostreaceaPsoriasis with concentric tiers of scales which give the appearance of the layering of an oyster shell. ... Synonym: psoriasis rupioides. ... (05 Mar 2000) ...
psoriasis punctataPsoriasis in which the individual lesions are papules, each red in colour, and tipped with a single white scale. ... (05 Mar 2000) ...
psoriasis rupioidesSynonym for psoriasis ostreacea ... Psoriasis with concentric tiers of scales which give the appearance of the layering of an oyster shell. ... Synonym: psoriasis rupioides. ... (05 Mar 2000) ...
psoriasis spondyliticaPsoriasis associated with an ankylosing spondylitis. ... (05 Mar 2000) ...
psoriasis universalisA generalised psoriasis. ... (05 Mar 2000) ...
psoriaticRelating to psoriasis. ... Synonym: psoriasic. ... (05 Mar 2000) ...
psoriatic arthritis<radiology> Types: true psoriatic arthritis (1/3), resembling rheumatoid arthritis (1/3), combination of psoriatic and RA (1/3) findings: no juxta-articular osteoporosis (unlike RA), periosteal reaction frequent, assymetrical destruction of DIP with ankylosis, resorption of terminal tufts with pencil in cup deformity, ivory phalanx, destructi …
psoroidResembling scabies. ... Origin: G. Psora, itch (scabies), + eidos, resemblance ... (05 Mar 2000) ...
PsoroptesA genus of itch or mange mites (family Cheyletidae), including the species Psoroptes cuniculi (the scab mite of rabbits), Psoroptes equi (the mange or body mite of horses), and Psoroptes ovis (the common scab mite of sheep and cattle). ... Origin: G. Psora, itch ... (05 Mar 2000) ...
psoroptic acariasisInfestation of mammalian skin with Psoroptes mites. ... (05 Mar 2000) ...
psoroptic mangeHair loss or mange caused by infestation with mites of the genus Psoroptes. ... (05 Mar 2000) ...
PSP<abbreviation> Phenolsulfonphthalein. ... (05 Mar 2000) ...
PspPI DNA methyltransferase<enzyme> Methylates first cytosine in ggncc ... Registry number: EC 2.1.1.- ... Synonym: psppi methyltransferase, mtase (psppi), psppim gene product ... (26 Jun 1999) ...
psych-See: psycho-. ... (05 Mar 2000) ...
psychagogyRarely used term for psychotherapeutic reeducation stressing social adjustment of the individual. ... Origin: psych-+ G. Agogia, a tutor's office ... (05 Mar 2000) ...
psychalgaliaSynonym for psychalgia ... 1. Distress attending a mental effort, noted especially in melancholia. ... Synonym: algopsychalia, mind pain, phrenalgia, psychalgalia, soul pain. ... Synonym: psychogenic pain. ... Origin: psych-+ G. Algos, pain ... (05 Mar 2000) ...
psychalgia1. Distress attending a mental effort, noted especially in melancholia. ... Synonym: algopsychalia, mind pain, phrenalgia, psychalgalia, soul pain. ... Synonym: psychogenic pain. ... Origin: psych-+ G. Algos, pain ... (05 Mar 2000) ...
psychaliaAn emotional condition characterised by auditory and visual hallucinations. ... (05 Mar 2000) ...
psychanopsiaSynonym: mind blindness. ... Origin: psych-+ G. An-priv, + opsis, vision ... (05 Mar 2000) ...
psychataxiaMental confusion; inability to fix one's attention or to make any continued mental effort. ... Origin: psych-+ G. Ataxia, confusion ... (05 Mar 2000) ...
psychedelic1. Pertaining to a rather imprecise category of drugs with mainly central nervous system action, and with effects said to be the expansion or heightening of consciousness, e.g., LSD, hashish, mescaline. ... 2. A hallucinogenic substance, visual display, music, or other sensory stimulus having such action. ... Origin: psyche-+ G. Deloo, to manifest …
psychedelic drugSynonym for hallucinogen ... <pharmacology> A class of medications (for example LSD, marijuana, peyote, heroin, cocaine) that result in a distorted perception of reality. Often accompanied by hallucinations. ... (27 Sep 1997) ...
psychedelic therapyPsychiatric therapy utilizing psychedelic drugs. ... (05 Mar 2000) ...
psychentoniaRarely used term for mental tension. ... Origin: psych-+ G. En, in, + tonos, tension ... (05 Mar 2000) ...
psychiatriaSynonym for psychiatry ... A branch of medicine concerned with the diagnosis, treatment and prevention of mental illness. ... (09 Oct 1997) ...
psychiatricPertaining to or within the purview of psychiatry. ... (18 Nov 1997) ...
psychiatric aidesPersons who assist in the routine care of psychiatric persons, usually under the supervision of the nursing department. ... (12 Dec 1998) ...
psychiatric department, hospitalHospital department responsible for the organization and administration of psychiatric services. ... (12 Dec 1998) ...
