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Слова на букву du b-extr (2629)

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Du Bois-Reymond
Emil H., German physiologist, 1818–1896. See Du Bois- Reymond law.
dualism
1. In chemistry, a theory advanced by Berzelius that every compound, no matter how many elements enter into it, is composed of two parts, one electrically negative, the other ...
Duane
Alexander, U.S. ophthalmologist, 1858–1926. See D. syndrome.
Dubin
I. Nathan, U.S. pathologist, 1913–1980. See D.- Johnson syndrome.
DuBois
Eugene F., U.S. physiologist, 1882–1959. See D. formula, Aub-D. table.
Dubois
Paul A., French obstetrician, 1795–1871. See D. abscesses, under abscess, D. disease.
duboisine
An alkaloid obtained from the leaves of Duboisia myoporoides (family Solanaceae). See hyoscyamine.
Duboscq
Jules, French optician, 1817–1886. See D. colorimeter.
Dubowitz
Victor, South African-English pediatrician, *1931. See D. score.
Dubreuil-Chambardel
Louis, French dentist, 1879–1927. See Dubreuil-Chambardel syndrome.
Duchenne
Guillaume B.A., French neurologist, 1806–1875. See D. disease, D. sign, D.-Aran disease, Aran-D. disease, D.-Erb paralysis, D. dystrophy.
Duchenne muscular dystrophy
The best-known form of muscular dystrophy, Duchenne muscular dystrophy (DMD) is caused by a genetic error in a gene on the X chromosome that prevents the production of ...
Duckworth
Sir Dyce, English physician, 1840–1928. See D. phenomenon.
Ducrey
Augusto, Italian dermatologist, 1860–1940. See D. bacillus, D. test.
duct
A tubular structure giving exit to the secretion of a gland or organ, capable of conducting fluid. SEE ALSO: canal. SYN: ductus [TA]. [L. duco, pp. ductus, to lead] - aberrant ...
ductal
Relating to a duct.
ductile
Denoting the property of a material that allows it to be bent, drawn out (as a wire), or otherwise deformed without breaking. [L. ductilis, capable of being led or drawn]
duction
1. The act of leading, bringing, conducting. 2. In ophthalmology, ocular rotations with reference to one eye; usually additionally designating direction of movement of the eye; ...
ductless
Having no duct; denoting certain glands having only an internal secretion.
ductular
Relating to a ductule.
Ductular hypoplasia, syndromatic hepatic
Also called Alagille syndrome or arteriohepatic dysplasia, this is a genetic disorder characterized by jaundice in the newborn period, liver disease with cholestasis, ...
ductule
A minute duct. SYN: ductulus. - aberrant ductules [TA] the superior or inferior diverticula of the epididymis. SYN: ductuli aberrantes [TA], aberrant ducts, ductus ...
ductulus
SYN: ductule. [Mod. L. dim. of L. ductus, duct] - d. aberrans inferior [TA] SYN: inferior aberrant ductule. - d. aberrans superior [TA] SYN: superior aberrant ductule. - ...
Ductus
A duct or walled passageway. Our word "duct" is a contraction of the Latin word "ductus" meaning "leading". The Romans, however, preferred the word ...
Ductus arteriosus
A key arterial shunt (ductus) in fetal life. Before birth, blood pumped from the heart through the pulmonary artery toward the lungs is shunted into the aorta. This arterial shunt ...
Ductus, patent
Failure for the ductus arteriosus, an arterial shunt in fetal life, to close on schedule. Before birth, blood pumped from the heart through the pulmonary artery toward the lungs ...
Duddell
Benedict, 18th century British oculist. See D. membrane.
Due date
The estimated calendar date when a baby will be born, the date the baby is due to be born. It is also called the estimated date of confinement (EDC).
Duffy blood group
See Blood Groups appendix.
Dugas
Louis A., U.S. physician, 1806–1884.
Duhring
Louis A., U.S. dermatologist, 1845–1913. See D. disease.
Dührssen
Alfred, German obstetrician-gynecologist, 1862–1933. See D. incisions, under incision.
Duke
William Waddell D., U.S. pathologist, 1883–1945. See D. bleeding time test.
Dukes
Clement, English physician, 1845–1925. See D. disease, Filatov-D. disease. Cuthbert E., British pathologist, 1890–1977. See D. classification.
dulcin
Has been used as a substitute for sugar, being 200 times as sweet as cane sugar. Because of hydrolysis to aminophenol, it may produce an injurious effect when used over long ...
dull
Not sharp or acute, in any sense; qualifying a surgical instrument, the action of the mind, pain, a sound (especially the percussion note), etc. [M.E. dul]
dullness, dulness
The character of the sound obtained by percussing over a solid part incapable of resonating; usually applied to an area containing less air than those which can resonate. - ...
Dulong
Pierre L., French chemist, 1785–1838. See D.-Petit law.
Dumdum fever
Also called kala-azar, a chronic, potentially fatal parasitic disease of the viscera (the internal organs) due to infection by an agent called Leishmania donovani. Leishmania ...
duocrinin
A postulated gastrointestinal hormone that is liberated by the contact of gastric contents with the intestine and that stimulates the secretory activity of the duodenal glands ( ...
duodenal
Relating to the duodenum.
Duodenal ulcer
An ulcer (a hole in the lining) of the duodenum (the first portion of the small intestine). Ulcers can affect the stomach, duodenum, or esophagus. Their formation is related to H. ...
duodenectomy
Excision of the duodenum. [duodenum + G. ektome, excision]
duodenitis
Inflammation of the duodenum.
duodeno-
Combining form relating to the duodenum. [L. duodenum, scil., digitorum breadth of 12 fingers]
duodenocholangitis
Inflammation of the duodenum and common bile duct. [ duodeno- + G. chole, bile, + angeion, vessel, + -itis, inflammation]
duodenocholecystostomy
SYN: cholecystoduodenostomy. [ duodeno- + G. chole, bile, + kystis, bladder, + stoma, mouth]
duodenocholedochotomy
Incision into the common bile duct and the adjacent portion of the duodenum. [ duodeno- + G. cholèdochus, bile duct, + tome, incision]
duodenocystostomy
1. SYN: cholecystoduodenostomy. 2. SYN: cystoduodenostomy. 3. SYN: pancreatic cystoduodenostomy.
duodenoenterostomy
Establishment of communication between the duodenum and another part of the intestinal tract. [ duodeno- + G. enteron, intestine, + stoma, mouth]
duodenojejunostomy
Operative formation of an artificial communication between the duodenum and the jejunum. [ duodeno- + jejunum, + G. stoma, mouth]
duodenolysis
Incision of adhesions to the duodenum. [ duodeno- + G. lysis, a freeing]
duodenorrhaphy
Suture of a tear or incision in the duodenum. [ duodeno- + G. rhaphe, a seam]
duodenoscopy
Inspection of the interior of the duodenum through an endoscope. [ duodeno- + G. skopeo, to examine]
duodenostomy
Establishment of a fistula into the duodenum. [ duodeno- + G. stoma, mouth]
duodenotomy
Incision of the duodenum. [ duodeno- + G. tome, incision]
Duodenum
: The first part of the small intestine. The duodenum is a common site for peptic ulcer formation. * * * The first division of the small intestine, about 25 cm or 12 ...
duovirus
SYN: rotavirus.
duplex
Providing two functions. See d. ultrasonography.
Duplication
Part of a chromosome in duplicate, a particular kind of mutation (change) involving the production of one or more copies of any piece of DNA, including a gene or even an entire ...
duplicitas
Doubling of a part. [L. a doubling, fr. duplex (duplic-), two-fold] - d. anterior conjoined twins in which there are two thoraces and two heads and a single pelvis with one pair ...
Dupré
17th Century Paris surgeon and anatomist. See Dupré muscle.
Dupuytren
Baron Guillaume, French surgeon and surgical pathologist, 1777–1835. See D. amputation, D. canal, D. contracture, D. disease of the foot, D. fascia, D. fracture, D. ...
Dupuytren contracture
A localized formation of scar tissue in the palm of the hand. The scarring accumulates in a tissue (fascia) beneath the skin of the palm that normally covers the tendons that pull ...
dur. dolor.
Abbreviation for L. duarte dolare, while pain lasts.
dura
SYN: d. mater. [L. fem. of durus, hard] - d. mater cranialis [TA] SYN: cranial d. mater.
dura mater
Pachymeninx (as distinguished from leptomeninx, the combined pia mater and arachnoid); a tough, fibrous membrane forming the outer covering of the central nervous system. SYN: ...
Durable power of attorney
This is a type of advance medical directive in which legal documents provide the power of attorney to another person in the case of an incapacitating medical condition. The ...
duraencephalosynangiosis
Surgical transposition of the superficial temporal artery with attached galea to the underlying dura with hope for cerebral revascularization; most commonly used in moyamoya ...
dural
Relating to the dura mater. SYN: duramatral.
duramatral
SYN: dural.
Duran-Reynals
Francisco, U.S. bacteriologist, 1899–1958. See Duran-Reynals permeability factor.
duraplasty
A reconstructive operation on the open dura mater that involves a primary closure or secondary closure with another soft tissue material ( e.g., muscle, fascia, allograft dura). ...
duration
A continuous period of time. - half amplitude pulse d. the time, in milliseconds, required for a wave form to reach half of its full magnitude. - pulse wave d. the interval ...
Dürck
Hermann, German pathologist, 1869–1941. See D. nodes, under node.
Duret
Henri, French neurosurgeon, 1849–1921. See D. lesion, D. hemorrhage.
Durham
Arthur E., English surgeon, 1834–1895. See D. tube.
Duroziez
Paul L., French physician, 1826–1897. See D. disease, D. murmur, D. sign.
DUSN
Acronym for diffuse unilateral subacute neuroretinitis.
dUTP
Abbreviation for deoxyuridine 5-triphosphate.
Dutton
Joseph Everett, English physician, 1877–1905. See D. disease, D. relapsing fever.
Duverney
Guichaud Joseph, French anatomist, 1648–1730. See D. fissures, under fissure, D. gland, D. muscle.
DV (Daily Value)
A new term appearing on food labels. It stands for Daily Value, a new dietary reference value designed to help consumers use food label information to plan a healthy diet. Daily ...
DVT (deep vein thrombosis)
Blood clotting in the veins of the inner thigh or leg. In air travel, DVT is the "economy-class syndrome." Even in young, health travelers the long stretches immobilized ...
dwarf
An abnormally undersized person with disproportion among the bodily parts. See dwarfism. [A.S. dweorh] - hypophysial d. dwarfism as result of failure of growth hormone ...
Dwarfism
Abnormally short stature, which may be due to a variety of causes. Some forms are hereditary. See also {{}}achondroplasia; dwarfism, pituitary. * * * A condition or a group of ...
Dwarfism, achondroplastic
A genetic disorder of bone growth, achondroplasia is the most common cause of short stature with disproportionately short limbs — dwarfism with short arms and legs. There is ...
Dwarfism, pituitary
Dwarfism caused by a lack of growth hormone, usually due to malfunction of the pituitary gland. Children with growth hormone deficiency may grow normally for the first two to ...
Dwarfism, thanatophoric
A form of short-limbed (micromelic) dwarfism that usually causes death within the first few hours after birth. Thanatophoric dysplasia is due to a lethal mutation (change) in ...
Dwyer
Frederick, English orthopaedic surgeon, 1920–1975. See D. osteotomy.
Dx
Abbreviation for diagnosis, the establishment of the nature of a disease. Also written DX amd dx. Diff dx stands for differential diagnosis, the process of weighing the ...
Dy
Symbol for dysprosium.
Dyad
The word "dyad" comes from the Greek "dyas" meaning the number two. In psychology, a dyad refers to a pair of persons in an interactional situation. For example, a patient and ...
dyclonine hydrochloride
A topical local anesthetic.
dydrogesterone
A synthetic steroid, derived from retroprogesterone, with progestational effects.
dye
A stain or coloring matter; a compound consisting of chromophore and auxochrome groups attached to one or more benzene rings, its color being due to the chromophore and its ...
Dyggve
Holger, Danish pediatrician, 1913–1984. See D.-Melchior- Clausen syndrome.
dynamics
1. The science of motion in response to forces. 2. In psychiatry, used as a contraction of psychodynamics. 3. In the behavioral sciences, any of the numerous intrapersonal ...
dynamo-
Combining form denoting force, energy. [G. dynamis, power]
dynamogenesis
The production of force, especially of muscular or nervous energy. SYN: dynamogeny. [ dynamo- + G. genesis, production]
dynamogenic
Producing power or force, especially nervous or muscular power or activity.
dynamogeny
SYN: dynamogenesis.
dynamograph
An instrument for recording the degree of muscular power. [ dynamo- + G. grapho, to write]
dynamometer
An instrument for measuring the degree of muscular power. SYN: ergometer. [ dynamo- + G. metron, measure]
dynamoscope
A modified stethoscope for auscultation of the muscles. [ dynamo- + G. skopeo, to examine]
dynamoscopy
Auscultation of a contracting muscle.
dynatherm
An apparatus for inducing diathermy. [G. dynamis, force, + therme, heat]
dyne
The unit of force in the CGS system, replaced in the SI system by the newton (1 N = 105 dynes), that gives a body of 1 g mass an acceleration of 1 cm/sec2; expressed as F ...
dynein
A protein associated with motile structures, exhibiting adenosine triphosphatase activity; it forms “arms” on the outer tubules of cilia and flagella. It functions as a ...
dynorphin
An endogenous opioid ligand that acts as an agonist at opiate receptors. Extremely potent, widely distributed neuropeptide that has 17 amino acid residues and contains ...
dyphylline
Exhibits characteristic peripheral vasodilator and bronchodilator actions of other theophylline compounds.
Dys-
A prefix denoting an inability or lack of function, as in dyspraxia (lack of ability to adequately control muscle movements). * * * Bad, difficult, un-, mis-; opposite of eu-. ...
dysacousia, dysacusia
SYN: dysacusis.
dysacusis
1. Any impairment of hearing involving difficulty in processing details of sound as opposed to any loss of sensitivity to sound. 2. Pain or discomfort in the ear from exposure ...
dysadaptation
Inability of the retina and iris to accommodate well to varying intensities of light.
dysantigraphia
A form of agraphia in which the subject is unable to copy written or printed matter. [dys- + G. antigrapho, to write back]
dysaphia
Impairment of the sense of touch. [dys- + G. haphe, touch]
dysaphic
Relating to impaired tactile sensibility.
dysarteriotony
Abnormal blood pressure, either too high or too low. [dys- + G. arteria, artery, + tonos, tension]
Dysarthria
Speech that is characteristically slurred, slow, and difficult to produce (difficult to understand). The person with dysarthria may also have problems controlling the pitch, ...
dysarthric
Relating to dysarthria.
dysarthrosis
1. SYN: dysarthria. 2. Malformation of a joint. 3. A false joint. [dys- + G. arthrosis, joint]
dysautonomia
Abnormal functioning of the autonomic nervous system. [dys- + G. autonomia, self-government] - familial d. [MIM*223900] a congenital syndrome with specific disturbances of the ...
dysbarism
General term for the symptom complex resulting from exposure to decreased or changing barometric pressure, including all physiologic effects resulting from such changes with the ...
dysbasia
1. Difficulty in walking. 2. The difficult or distorted walking that occurs in persons with certain mental disorders. [dys- + G. basis, a step] - d. angiosclerotica, d. ...
dysbetalipoproteinemia
SYN: type III familial hyperlipoproteinemia.
dysbolism
Abnormal, but not necessarily morbid, metabolism, as in alkaptonuria. [dys- + G. bole (metabole), + -ismos, metabolism]
dysbulia
Weakness and uncertainty of volition. [dys- + G. boule, will]
dysbulic
Relating to, or characterized by, dysbulia.
Dyscalculia
A specific developmental disability affecting a person’s ability to conceptualize and perform mathematics. Mild cases can often be compensated for with use of a calculator, but ...
dyscephalia
Malformation of the head and face. SYN: dyscephaly. [dys- + G. kephale, head] - d. mandibulo-oculofacialis [MIM*234100] a syndrome of bony anomalies of the calvaria, face, and ...
dyscephaly
SYN: dyscephalia.
dyscheiral, dyschiral
Relating to dyscheiria.
dyscheiria, dyschiria
A disorder of sensibility in which, although there is no apparent loss of sensation, the patient is unable to tell which side of the body has been touched (acheiria), or refers ...
dyschezia
Difficulty in defecation. [dys- + G. chezo, to defecate]
dyschondrogenesis
Abnormal development of cartilage. [dys- + G. chondros, cartilage, + genesis, production]
dyschondroplasia
SYN: enchondromatosis. [dys- + G. chondros, cartilage, + plasis, a forming] - d. with hemangiomas SYN: Maffucci syndrome.
dyschondrosteosis
A skeletal dysplasia, more severe in females and with a female preponderance, characterized by bowing of radius, dorsal dislocation of the distal ulna with limited movement of ...
dyschroia, dyschroa
A bad complexion; discoloration of the skin. [dys- + G. chroia, chroa, color]
dyschromatopsia
A condition in which the ability to perceive colors is not fully normal. Cf.:anomalous trichromatism, dichromatism, monochromatism, chromatopsia. [dys- + G. chroma, color, + ...
dyschromatosis
An asymptomatic anomaly of pigmentation occurring among the Japanese; may be localized or diffuse. [dys- + G. chroma, color, + -osis, condition]
dyschromia
Any abnormality in the color of the skin.
dyscinesia
SYN: dyskinesia.
dyscontrol
SYN: intermittent explosive disorder.
dyscoria
Abnormality in the shape of the pupil. [dys- + G. kore, pupil of eye]
dyscrasia
1. A morbid general state resulting from the presence of abnormal material in the blood, usually applied to diseases affecting blood cells or platelets. 2. Old term indicating ...
dyscrasic, dyscratic
Pertaining to or affected with dyscrasia.
dysdiadochokinesia, dysdiadochocinesia
Impairment of the ability to perform rapidly alternating movements. [dys- + G. diadochos, working in turn, + kinesis, movement]
dysdiadochokinesis
SYN: adiadochokinesis.
dysemia
Any abnormal condition or disease of the blood. [dys- + G. haima, blood]
dysencephalia splanchnocystica
A malformation syndrome, lethal in the perinatal period, and characterized by intrauterine growth retardation, sloping forehead, occipital encephalocele, ocular anomalies, ...
dysenteric
Relating to or suffering from dysentery.
Dysentery
Inflammation of the intestine, often with pain, diarrhea, bloody stools, etc. It is usually caused by infestation of the bowel by an ameba. Dysentery can be fatal, usually due ...
Dysentery, amebic
Dysentery (inflammation of the intestine) with ulcers in the colon due to infection with an ameba (Entamoeba histolytica). This single-celled parasite is transmitted to humans ...
dyserethism
A condition of slow response to stimuli. [dys- + G. erethismos, irritation]
dysergia
Lack of harmonious action between the muscles concerned in executing any definite voluntary movement. [dys- + G. ergon, work]
dysesthesia
1. Impairment of sensation short of anesthesia. 2. A condition in which a disagreeable sensation is produced by ordinary stimuli; caused by lesions of the sensory pathways, ...
dysfibrinogenemia
An autosomal dominant disorder of qualitatively abnormal fibrinogens of various types; each type is named for the city in which the abnormal fibrinogen was discovered. Examples ...
Dysfunction
Difficult function or abnormal function. There is, for example: Constitutional hepatic dysfunction, (familial nonhemolytic jaundice), Dental dysfunction (abnormal functioning of ...
dysgammaglobulinemia
An immunoglobulin abnormality, a disturbance of the percentage distribution of γ-globulins or selective deficiency of one or more immunoglobulins.
dysgenesis
Defective development. [dys- + G. genesis, generation] - cortical d. SYN: cortical dysplasia. - gonadal d. defective gonadal development, varying types and degrees of which have ...
dysgenic
Applying to factors that have a detrimental effect upon hereditary qualities, physical or mental.
dysgerminoma
A malignant neoplasm of the ovary (counterpart of seminoma of the testis), composed of undifferentiated gonadal germinal cells and occurring more frequently in patients less ...
dysgeusia
Distortion or perversion in the perception of a tastant. An unpleasant perception may occur when a normally pleasant taste is present, or the perception may occur when no ...
dysgnathia
Any abnormality that extends beyond the teeth and includes the maxilla or mandible, or both. [dys- + G. gnathos, jaw]
dysgnathic
Pertaining to or characterized by abnormality of the maxilla and mandible.
dysgnosia
Any cognitive disorder, i.e., any mental illness. [G. d., difficulty of knowing]
dysgonic
A term used to indicate that the growth of a bacterial culture is slow and relatively poor; used especially in reference to the growth of cultures of the bovine tubercle bacillus ...
Dysgraphia
A specific developmental disability that affects the person’s ability to write. Problems may include fine-motor muscle control of the hands and/or processing difficulties. ...
dyshematopoiesis
Defective formation of the blood. SYN: dyshemopoiesis. [dys- + G. haima (haimat-), blood, + poiesis, making]
dyshematopoietic
Pertaining to or characterized by dyshematopoiesis. SYN: dyshemopoietic.
dyshemopoiesis
SYN: dyshematopoiesis.
dyshemopoietic
SYN: dyshematopoietic.
dyshidria
SYN: dyshidrosis.
dyshidrosis
A vesicular or vesicopustular eruption of multiple causes that occurs primarily on the volar surfaces of the hands and feet; the lesions spread peripherally but have a tendency ...
dysjunction
A separation of parts or structures normally joined; cleavage. - Le Fort III craniofacial d. SYN: craniofacial d. fracture.
dyskaryosis
Abnormal maturation seen in exfoliated cells that have normal cytoplasm but hyperchromatic nuclei, or irregular chromatin distribution; may be followed by the development of a ...
dyskaryotic
Pertaining to or characterized by dyskaryosis.
dyskeratoma
A skin tumor exhibiting dyskeratosis. [dys- + G. keras, horn, + -oma, tumor] - warty d. a benign solitary tumor of the skin, usually of the scalp, face, or neck, with a central ...
dyskeratosis
1. Premature keratinization in individual epithelial cells that have not reached the keratinizing surface layer; dyskeratotic cells generally become rounded and they may break ...
Dyskeratosis congenita
An inherited cause of bone-marrow failure, dyskeratosis congenita is a syndrome characterized by abnormal excess skin pigmentation, abnormal or absent nails, and mucosal ...
dyskeratotic
Relating to or characterized by dyskeratosis.
Dyskinesia
1. Difficulty in performing voluntary movements. The term dyskinesia is commonly used in relation to Parkinson's disease and other so-called extrapyramidal disorders. The word ...
dyskinesis
SYN: dyskinesia. - ciliary d. 1. absent or impaired motion of the cilia, occurring as a primary or secondary disorder; SEE ALSO: Kartagener syndrome. 2. associated with ...
dyskinetic
Denoting or characteristic of dyskinesia.
Dyslexia
Dyslexia is a specific reading disability due to a defect in the brain's (higher cortical) processing of graphic symbols. Dyslexia is thus a learning disability that alters the ...
dyslexic
Relating to, or characterized by, dyslexia.
dyslogia
Impairment of speech and reasoning as the result of a mental disorder. [dys- + G. logos, speaking, reason]
dysmasesis
Difficulty in mastication. [dys- + G. masesis, chewing]
dysmature
1. Denoting faulty development or ripening; often connoting structural and/or functional abnormalities. 2. In obstetrics, denoting an infant whose birth weight is ...
dysmaturity
Syndrome of an infant born with relative absence of subcutaneous fat, wrinkling of the skin, prominent finger and toe nails, and meconium staining of the infant's skin and of the ...
dysmelia
Congenital abnormality characterized by missing or foreshortened limbs. See amelia, phocomelia. [dys- + G. melos, limb]
dysmenorrhea
Difficult and painful menstruation. SYN: menorrhalgia. [dys- + G. men, month, + rhoia, a flow] - functional d. SYN: primary d.. - mechanical d. d. due to obstruction of ...
dysmetria
An aspect of ataxia, in which the ability to control the distance, power, and speed of an act is impaired. Usually used to describe abnormalities of movement caused by cerebellar ...
dysmorphia
SYN: dysmorphism.
Dysmorphic feature
A body characteristic that is abnormally formed. A malformed ear, for example, is a dysmorphic feature. Dysmorphology is a term coined by Dr. David W. Smith in the 1960's to ...
dysmorphism
Abnormality of shape. SYN: dysmorphia. [G. dysmorphia, badness of form]
dysmorphogenesis
The process of abnormal tissue formation. [dys- + G. morphe, form, + genesis, production]
Dysmorphology
Dysmorphology is a term coined by Dr. David W. Smith in the 1960's to describe the study of human congenital malformations (birth defects), particularly those affecting the ...
dysmorphophobia
SYN: body dysmorphic disorder. [dys- + G. morphe, form, + phobos, fear]
dysmyelination
Improper laying down or breakdown of a myelin sheath of a nerve fiber, caused by abnormal myelin metabolism.
dysmyotonia
Abnormal muscular tonicity (either hyper- or hypo-). See dystonia. [dys- + G. mys, muscle, + tonos, tension, tone]
dysnystaxis
A condition of half sleep. SYN: light sleep. [dys- + G. nystaxis, drowsiness]
dysodontiasis
Difficulty or irregularity in the eruption of the teeth. [dys- + G. odous, tooth, + -iasis, condition]
dysontogenesis
Defective embryonic development. [dys- + G. on, being, + genesis, origin]
dysontogenetic
Characterized by dysontogenesis.
dysorexia
Diminished or perverted appetite. [dys- + G. orexis, appetite]
dysosmia
Distortion or perversion in the perception of an odorant; an unpleasant perception may occur when a normally pleasant odor is present, or the perception may occur when no ...
dysosteogenesis
Defective bone formation. SYN: dysostosis. [dys- + G. osteon, bone, + genesis, production]
dysostosis
SYN: dysosteogenesis. [dys- + G. osteon, bone, + -osis, condition] - acrofacial d. mandibulofacial d. associated with malformations of the extremities such as defective radius ...
Dysostosis, cleidocranial
A genetic (inherited) disorder of bone development characterized by: {{}}Absent or incompletely formed collar bones (the “cleido-“ part refers to the clavicles, the collar ...
dyspallia
Developmental distortion of the brain mantle. [dys- + L. pallium, cloak]
Dyspareunia
The medical term for pain during sexual intercourse. * * * Occurrence of pain during sexual intercourse. [dys- + G. pareunos, lying beside, fr. para, beside, + eune, a bed]
dyspepsia
Impaired gastric function or “upset stomach” due to some disorder of the stomach; characterized by epigastric pain, sometimes burning, nausea, and gaseous eructation. SYN: ...
dyspeptic
Relating to or suffering from dyspepsia.
dysphagia, dysphagy
Difficulty in swallowing. SEE ALSO: aglutition. [dys- + G. phago, to eat] - d. lusoria d. said to be due to compression by the right subclavian artery arising abnormally from ...
dysphagocytosis
Disordered phagocytosis, especially failure of cells to ingest and digest bacteria. - congenital d. SYN: chronic granulomatous disease.
dysphasia
Impairment in the production of speech and failure to arrange words in an understandable way; caused by an acquired lesion of the brain. SYN: dysphrasia. [dys- + G. phasis, ...
dysphemia
Disordered phonation, articulation, or hearing due to emotional or mental deficits. [dys- + G. pheme, speech]
dysphonia
Altered voice production. [dys- + G. phone, voice] - abductor spasmodic d. a breathy form of spasmodic d. caused by excessive and long vocal cord opening for voiceless phonemes ...
Dysphonia, spasmodic
A voice disorder, also called laryngeal dystonia, caused by involuntary movements of one or more muscles of the larynx or voice box. People who have spasmodic dysphonia may ...
dysphoria
A mood of general dissatisfaction, restlessness, depression, and anxiety; a feeling of unpleasantness or discomfort. [dys- + G. phora, a bearing] - late luteal phase d. SYN: ...
dysphrasia
SYN: dysphasia. [dys- + G. phrasis, speaking]
dyspigmentation
Any abnormality in the formation or distribution of pigment, especially in the skin; usually applied to an abnormal reduction in pigmentation (depigmentation). SEE ALSO: ...
dyspinealism
Obsolete term for the syndrome supposed to result from the deficiency of pineal gland secretion.
dyspituitarism
The complex of phenomena due to excessive or deficient secretion by the pituitary gland.
Dysplasia
Abnormal in form. From the Greek dys- (bad, disordered, abnormal) and plassein (to form). For example, retinal dysplasia is abnormal formation of the retina during embryonic ...
Dysplasia, arteriohepatic
Also known as Alagille syndrome, this ia a genetic disorder characterized by jaundice in the newborn period, liver disease with cholestasis, peripheral pulmonic stenosis and ...
Dysplasia, bronchopulmonary
Chronic lung disease in infants who have received mechanical respiratory support with high oxygenation in the neonatal period.
Dysplasia, cleidocranial
A genetic (inherited) disorder of bone development characterized by: {{}}Absent or incompletely formed collar bones (the “cleido-“ part refers to the clavicles, the collar ...
Dysplasia, congenital hip
The abnormal formation of the hip joint in which the ball at the top of the thighbone (the femoral head) is not stable within the socket (the acetabulum). The ligaments of the ...
Dysplasia, faciodigitogenital
This disorder is characterized by multiple birth defects involving the face, fingers and genitalia. Features include wide spaced eyes (ocular hypertelorism), front-facing ...
Dysplasia, thanatophoric
A form of short-limbed (micromelic) dwarfism that usually causes death within the first few hours after birth. Thanatophoric dysplasia is due to a lethal mutation (change) in ...
dysplastic
Pertaining to or marked by dysplasia.
Dysplastic nevi
: Atypical moles; moles whose appearance is different from that of common moles. Dysplastic nevi are generally larger than ordinary moles and have irregular borders. Their ...
Dyspnea
Difficult or labored breathing; shortness of breath. Dyspnea is a sign of serious disease of the airway, lungs, or heart. The onset of dyspnea should not be ignored but is reason ...
dyspneic
Out of breath; relating to or suffering from dyspnea.
Dyspnoea
Difficult or labored breathing; shortness of breath. Dyspnoea is a sign of serious disease of the airway, lungs, or heart. The onset of dyspnoea should not be ignored but is ...
dyspraxia
Impaired or painful functioning in any organ. [dys- + G. praxis, a doing]
Dyspraxia of speech
A developmental disability characterized by difficulty in muscle control, specifically of the muscles involved in producing speech. It is caused by a neurological difference that ...
Dyspraxia, developmental
A pattern of delayed, uneven, or aberrant development of physical abilities during childhood development. The physical abilities affected may be gross or fine motor skills. ...
dysprosium
A metallic element of the lanthanide (rare earth) series, atomic no. 66, atomic wt. 162.50. [G. dysprositos, hard to get at]
dysproteinemia
An abnormality in plasma proteins, usually in immunoglobulins.
dysproteinemic
Relating to dysproteinemia.
dysraphism, dysraphia
Defective fusion, especially of the neural folds, resulting in status dysraphicus or neural tube defect. [dys- + G. rhaphe, suture] - spinal d. a general term used to describe a ...
dysrhythmia
Defective rhythm.rhythm. Cf.:arrhythmia. [dys- + G. rhythmos, rhythm] - cardiac d. any abnormality in the rate, regularity, or sequence of cardiac activation. - ...
dyssomnia
Disturbance of normal sleep or rhythm pattern.
dysspondylism
An abnormality of development of the spine or vertebral column. [dys- + G. spondylos, vertebra]
dysstasia
Difficulty in standing. SYN: dystasia. [dys- + G. stasis, standing]
dysstatic
Marked by difficulty in standing.
dyssyllabia
SYN: syllable-stumbling. [dys- + G. syllabe, syllable]
dyssynergia
An aspect of ataxia, in which an act is not performed smoothly or accurately because of lack of harmonious association of its various components; usually used to describe ...
dystasia
SYN: dysstasia.
dystelephalangy
Bowing of the distal phalanx of the little finger. [dys- + G. telos, end, + phalanx]
Dysthymia
A type of depression involving long-term, chronic symptoms that are not disabling, but keep a person from functioning at "full steam" or from feeling good. Dysthymia is a less ...
dysthymic
Relating to dysthymia.
Dystocia
Difficult/abnormal labor or delivery. From the Greek "dys" meaning "difficult, painful, disordered, abnormal" + "tokos" meaning "birth." * ...
Dystocia, cervical
Dystocia caused by mechanical obstruction at the cervix.
Dystocia, fetal
Dystocia caused by the fetus due to its size (too big), shape or position in the uterus.
Dystonia
Involuntary movements and prolonged muscle contraction, resulting in twisting body motions, tremor, and abnormal posture. These movements may involve the entire body, or only an ...
Dystonia, cranial
A term used to describe dystonia that affects the muscles of the head, face, and neck. Oromandibular dystonia affects the muscles of the jaw, lips, and tongue. The jaw may be ...
Dystonia, dopa-responsive (DRD)
A condition that typically begins in childhood or adolescence with progressive difficulty in walking and, in some cases, spasticity and can be successfully treated with drugs. ...
Dystonia, focal, due to blepharospasm
The second most common focal dystonia, the involuntary, forcible closure of the eyelids. The first symptoms may be uncontrollable blinking. Only one eye may be affected ...

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