Copy of `Dorland's Medical Dictionary`

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Dorland's Medical Dictionary Category: Health and Medicine > Medical Dictionary Date & country: 31/12/2010, USA Words: 39128

pseudochromhidrosis
(soo″do-kro″mĭ-dro´sis) discoloration of sweat caused by the action of pigment-producing bacteria.

pseudocoarctation
(soo″do-ko″ahrk-ta´shәn) a condition radiographically resembling coarctation but without compromise of the lumen, as occurs in a congenital anomaly of the aortic arch.

pseudocolloid
(soo″do-kol´oid) a mucoid substance sometimes found in ovarian cysts.

pseudocoloboma
(soo″do-kol″o-bo´mә) a line or scar on the iris resembling a coloboma.

pseudocoma
(soo″do-co´mә) locked-in syndrome.

pseudocowpox virus
a virus that produces nodules on the udders and teats of milk cows and the oral mucosa of suckling calves (paravaccinia), which can be transmitted to humans during milking. Called also paravaccinia virus.

pseudocoxalgia
(soo″do-kok-sal´jә) osteochondrosis of the capitular epiphysis of the femur.

pseudocrisis
(soo´do-kri″sis) sudden but temporary abatement of febrile symptoms.

pseudocroup
(soo″do-krldbomacp´) laryngismus stridulus.

pseudocyesis
(soo″do-si-e´sis) false pregnancy.

pseudocylindroid
(soo″do-sә-lin´droid) a shred of mucin in the urine resembling a cylindroid.

pseudocyst
(soo´do-sist″) an abnormal or dilated cavity resembling a true cyst but not lined with epithelium. a cluster of small comma-shaped forms of Toxoplasma gondii, sometimes containing thousands of organisms within an irregular wall; it represents a resting stage, as opposed to the active, motile stage. P...

pseudodementia
(soo″do-dә-men´shә) a disorder resembling dementia but not due to organic brain disease and is potentially reversible by treatment; one form is the depressive symptoms seen in some older adults.

pseudodiphtheria
(soo″do-dif-thēr´e-ә) any of a group of infections resembling diphtheria but not caused by Corynbacterium diphtheriae; called also diphtheroid.

pseudodominance
(soo″do-dom´ĭ-nәns) appearance of a recessive phenotype in a pedigree, the recessive allele being expressed due to loss of the dominant allele, as by a chromosomal deletion. quasidominance.

pseudodominant
(soo″do-dom´ĭ-nәnt) pertaining to pseudodominance (def. 1). quasidominant; see quasidominance.

pseudoedema
(soo″do-ә-de´mә) a puffy state resembling edema

pseudoemphysema
(soo″do-em″fĭ-ze´mә) a condition resembling emphysema, but due to temporary obstruction of the bronchi.

pseudoephedrine
(soo″do-ә-fed´rin) one of the optical isomers of ephedrine, used in the form of the hydrochloride and sulfate salts as a nasal decongestant; administered orally.

pseudoexstrophy
(soo″do-ek´strә-fe) a developmental anomaly marked by the characteristic musculoskeletal defects of exstrophy of the bladder, but with no major defect of the urinary tract.

pseudofolliculitis
(soo″do-fә-lik″u-li´tis) a skin condition resembling folliculitis. pseudofolliculitis barbae a condition resembling folliculitis, involving the bearded region, usually seen in men of African descent who have very curly hair and shave their necks. It was formerly...

pseudofracture
(soo″do-frak´chәr) radiographic appearance of a thickened periosteum and new bone formation over what looks like an incomplete fracture.

pseudoganglion
(soo″do-gang´gle-on) an enlargement on a nerve resembling a ganglion.

pseudogene
(soo″do-jēn) a DNA sequence that is similar in sequence to an active gene at another locus but that has been inactivated by mutation and is not expressed.

pseudogeusesthesia
(soo″do-gldbomacs″es-the´zhә) a false sensation of taste associated with a sensation of another modality.

pseudogeusia
(soo″do-goo´zhә) a sensation of taste occurring in the absence of a stimulus or inappropriate to the exciting stimulus.

pseudoglioma
(soo″do-gli-o´mә) any condition mimicking retinoblastoma, such as retrolental fibroplasia or exudative retinopathy.

pseudoglottis
(soo″do-glot´is) the aperture between the false vocal cords. neoglottis. adj., pseudoglot´tic., adj.

pseudogout
(soo´do-gout) calcium pyrophosphate deposition disease, especially the acute and subacute forms.

pseudohematuria
(soo″do-he″mә-tu´re-ә) the presence in the urine of pigments that give it a pink or red color in absence of detectable hemoglobin or blood cells.

pseudohemophilia
(soo″do-he″mo-fil´e-ә) von Willebrand disease.

pseudohermaphrodite
(soo″do-hәr-maf´ro-dīt) an individual with pseudohermaphroditism.

pseudohermaphroditism
(soo″do-hәr-maf´ro-dit-iz″әm) a condition in which an individually is genetically and gonadally of one sex but has significant secondary sex characters of the opposite sex, often including ambiguous external genitalia. See also hermaphroditism. female pseudohermaphroditism ...

pseudohernia
(soo″do-hur´ne-ә) an inflamed sac or gland simulating strangulated hernia.

pseudohypertrophic muscular atrophy
pseudohypertrophic muscular dystrophy.

pseudohypertrophy
(soo″do-hi-pur´trә-fe) increase in size without true hypertrophy. adj., pseudohypertroph´ic., adj.

pseudohypoaldosteronism
(soo″do-hi″po-al-dos´tәr-ōn-iz″әm) elevated levels of aldosterone and increased plasma renin activity together with signs and symptoms of mineralocorticoid deficiency, caused by resistance of target tissues to mineralocorticoids. pseudohypoaldosteronism type 1 ...

pseudohyponatremia
(soo″do-hi″po-nә-tre´me-ә) a decreased serum sodium concentration that does not correspond to a real hypotonic disorder, i.e., the serum osmolality is normal. It occurs when hyperlipemia increases the serum non-water volume or hyperproteinemia increases the serum non-sodium solute.

pseudohypoparathyroidism
(soo″do-hi″po-par″ә-thi´roi-diz″әm) a hereditary condition clinically resembling hypoparathyroidism, but caused by failure of response to, rather than deficiency of, parathyroid hormone; it is marked by hypocalcemia and hyperphosphatemia and often by short stature, obesity, short meta...

pseudoisochromatic
(soo″do-i″so-kro-mat´ik) seemingly of the same color throughout, referring to a solution or chart for testing color blindness, having two pigments or colors that are distinguished by the normal eye but not by the color blind eye.

pseudojaundice
(soo″do-jawn´dis) yellowness of the skin due to blood changes and not to liver disease.

pseudologia
(soo″do-lo´jә) lying; falsehood. pseudologia fantastica a tendency to tell extravagant and fantastic falsehoods centered about the storyteller, who often comes to believe in and may act on them.

pseudolymphoma
(soo″do-lim-fo´mә) any of a group of disorders having a benign course but exhibiting clinical and histologic features suggestive of malignant lymphoma. Called also lymphocytoma.

pseudomelanoma
(soo″do-mel″ә-no´mә) a benign melanotic lesion resembling a superficial spreading melanoma occurring at the site of an incompletely removed melanocytic nevus.

pseudomelanosis
(soo″do-mel″ә-no´sis) pigmentation of tissues after death by blood pigments.

pseudomembrane
(soo″do-mem´brān) a membranous exudate, such as the diphtheritic membrane. Called also false membrane.

pseudomembranous angina
necrotizing ulcerative gingivostomatitis.

pseudomembranous colitis
pseudomembranous enterocolitis.

pseudomembranous inflammation
an acute inflammatory response to a powerful necrotizing toxin (such asdiphtheria toxin), characterized by formation on a mucosal surface of a false membrane composed of precipitated fibrin, necrotic epithelium, and inflammatory leukocytes.

Pseudomonas
(soo″do-mo´nәs) a genus of gram-negative, strictly aerobic, motile, straight or curved rod-shaped bacteria. Most species are saprophytic, but some are pathogenic for plants and animals. Pseudomonas aerugino´sa (which produces the pigments pyocyanin and fluorescein that give a blue color to the pus discharged...

Pseudomonas
hot foot syndrome a skin eruption characterized by painful, erythematous nodules on the soles of the feet, seen in persons exposed to Pseudomonas aeruginosa, such as children using a wading pool with abrasive strips of tape on the bottom. Called also hot foot syndrome.

Pseudomonas aeruginosa
pneumonia a form of bacterial pneumonia, usually nosocomial, seen in young children and debilitated or immunocompromised adults, caused by infection with Pseudomonas aeruginosa; characteristics include fever and coughing with lung nodules that may be either firm or hemorrhagic and may progress to necrosis of the alveoli wi...

pseudomyxoma
(soo″do-mik-so´mә) a mass of epithelial mucus resembling a myxoma. pseudomyxoma peritonei. pseudomyxoma peritonei the presence in the peritoneal cavity of mucoid material from a ruptured ovarian cyst or a ruptured mucocele of the appendix.

pseudoneuritis
(soo″do-ndbobr-ri´tis) a congenital hyperemic condition of the optic papilla.

pseudopapilledema
(soo″do-pap″ĭ-lә-de´mә) anomalous elevation of the optic disk.

pseudoparalysis
(soo″do-pә-ral´ĭ-sis) apparent loss of muscular power without real paralysis. Parrot pseudoparalysis , syphilitic pseudoparalysis pseudoparalysis of one or more extremities in infants, due to syphilitic osteochondritis of an epiphysis.

pseudoparaplegia
(soo″do-par″ә-ple´jә) spurious paralysis of the lower limbs, as in a conversion disorder or malingering.

pseudoparesis
(soo″do-pә-re´sis) a conversion or nonorganic condition simulating paresis.

pseudopelade
(soo″do-pә-lahd´) an uncommon type of alopecia characterized by the asymptomatic development of a distinctive scarlike patchy alopecia in adults.

pseudoplegia
(soo″do-ple´jә) hysterical paralysis.

pseudopodium
(soo″do-po´de-әm) a temporary protrusion of the cytoplasm of an ameba, serving for purposes of locomotion or to engulf food.

pseudopolyp
(soo″do-pol´ip) a hypertrophied tab of mucous membrane resembling a polyp, but caused by ulceration surrounding intact mucosa.

pseudopolyposis
(soo″do-pol″ĭ-po´sis) numerous pseudopolyps in the colon and rectum, due to longstanding inflammation.

pseudopregnancy
(soo″do-preg´nәn-se) false pregnancy.

pseudoprognathism
(soo″do-prog´nә-thiz-әm) protruding mandible resembling prognathism but due to altered tooth alignment, resulting from malocclusion.

pseudopseudohypoparathyroidism
(soo″do-soo″do-hi″po-par″ә-thi´roi-diz″әm) an incomplete form of pseudohypoparathyroidism, marked by the same constitutional features but by normal levels of calcium and phosphorus in the blood serum.

pseudopterygium
(soo″do-tәr-ij´e-әm) an adhesion of the conjunctiva to the cornea following a burn or other injury.

pseudoptosis
(soo″dop-to´sis) (soo″do-to´sis) decrease in the size of the palpebral aperture.

pseudopyogenic granuloma
a superficial variant of angiolymphoid hyperplasia with eosinophilia.

pseudorabies
(soo″do-ra´bēz) a highly contagious viral disease caused by a herpesvirus and primarily affecting the central nervous system. It is endemic in pigs; older pigs usually have a mild respiratory infection but piglets often have convulsions and die. It sometimes spreads to cattle, dogs, cats, and other mamm...

pseudorabies virus
a virus of the genus Varicellovirus that is the etiologic agent of pseudorabies.

pseudoreaction
(soo″do-re-ak´shәn) a false or deceptive reaction; in intradermal skin tests, a reaction not due to the specific test substance but to protein in the medium employed in producing the toxin.

pseudorickets
(soo″do-rik´әts) renal osteodystrophy.

pseudosarcoma
(soo″do-sahr-ko´mә) sarcomatoid transformation of a carcinoma histologically resembling a sarcoma; see also carcinosarcoma.

pseudosclerosis
(soo″do-sklә-ro´sis) a condition with the symptoms but without the lesions of multiple sclerosis. Westphal-Strümpell pseudosclerosis hepatolenticular degeneration.

pseudosmia
(soo-doz´me-ә) a sensation of odor without the appropriate stimulus.

pseudostratified epithelium
a type that looks stratified but is not, because its cells are arranged with their nuclei at different levels.

pseudotetanus
(soo″do-tet´ә-nәs) persistent muscular contractions resembling tetanus but not associated with Clostridium tetani.

pseudotruncus arteriosus
(soo″do-trung´kәs ahr-tēr″e-o´sәs) the most severe form of tetralogy of fallot, consisting of atresia of the pulmonic valve and absence of the main pulmonic artery; the lungs are supplied through a patent ductus arteriosus or from bronchial arteries arising from the aorta.

pseudotumor
(soo″do-too´mәr) an enlargement that resembles a tumor; it may result from inflammation, accumulation of fluid, or other causes, and may or may not regress spontaneously. pseudotumor cerebri cerebral edema and raised intracranial pressure without neurological signs excep...

pseudovertigo
(soo″do-vur´tĭ-go) any dizziness or other form of lightheadedness that resembles vertigo but does not involve a sense of rotation. Among many possible causes are hyperventilation, orthostatic hypotension, and panic disorder.

pseudoxanthoma elasticum
(soo″do-zan-tho´mә e-las´tĭ-kәm) a dermatosis marked clinically by small yellowish macules and papules, individual or confluent, or massed into plaques, and histologically by masses of swollen, calcified elastic fibers with degeneration of the collagen fibers in the lower and middle dermis a...

psi
pounds per square inch.

psi phenomenon
[psyche] an experience or effect that appears to be produced without physical agency or intermediation.

psicofuranine
(si″ko-fūr´ә-nēn) a nucleoside antibiotic produced by Streptomyces hygroscopicus, having antibacterial and antitumor activity.

psilocin
(si´lo-sin) a hallucinogenic substance closely related to psilocybin.

psilocybin
(si″lo-si´bin) a hallucinogen having indole characteristics, isolated from the mushroom Psilocybe mexicana.

psittacosis
(sit″ә-ko´sis) a disease with respiratory and systemic symptoms caused by infection with Chlamydia psittaci. It was seen first in parrots and later in other wild and domestic birds (in which it is called ornithosis); it is transmissible to humans having contact with infected birds, their droppings, or contaminated...

psoas major muscle
origin, lumbar vertebrae; insertion, lesser trochanter of femur; innervation, second and third lumbar nerves; action, flexes thigh or trunk.

psoas minor muscle
origin, last (lowest) thoracic and first (highest) lumbar vertebrae; insertion, pectineal line, iliopectineal eminence, iliac fascia; innervation, first lumbar nerve; action, flexes trunk.

psoas sign
flexion of or pain on hyperextension of the hip due to contact between an inflammatory process and the psoas muscle; the inflammation may indicate appendicitis. Called also Cope sign.

psoitis
(so-i´tis) inflammation of a psoas muscle or its sheath.

psoralen
(sor´ә-lәn) any of the constituents of certain plants, such as Psoralea corylifolia, that have the ability to produce phototoxic dermatitis when an individual is first exposed to it and then to sunlight; certain perfumes and drugs, such as methoxsalen, contain psoralens.

psoriasis
(sә-ri´ә-sis) any of several related chronic, recurrent skin diseases. The most common type is plaque psoriasis; other types include guttate, erythrodermic, and pustular psoriasis. Any body surface can be affected, but lesions appear most often on the scalp, knees, and elbows. Sometimes the nails are affecte...

psoriatic arthritis
that associated with severe psoriasis, usually affecting joints at the ends of the fingers or toes.

PSVT
paroxysmal supraventricular tachycardia.

psychalgia
(si-kal´jә) pain, usually in the head and perceived as being of emotional origin, that may accompany intolerable ideas, obsessions, or hallucinations. psychogenic pain. adj., psychal´gic., adj.

psychataxia
(si″kә-tak´se-ә) a disordered mental state with confusion and inability to concentrate.

psyche
(si´ke) the human faculty for thought, judgment, and emotion; the mental life, including both conscious and unconscious processes; the mind in its totality, as distinguished from the body. the soul or self. adj., psy´chic., adj.

psychedelic
(si″kә-del´ik) pertaining to or characterized by hallucinations, distortions of perception and awareness, and sometimes psychotic-like behavior; also, a drug producing such effects (see also hallucinogen). Psychedelic drugs include LSD and mescaline.