| Dubreuil-Chambardel | Louis, French dentist, 1879-1927. See: Dubreuil-Chambardel syndrome. (05 Mar 2000) |
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| Dubreuil-Chambardel syndrome | <syndrome> Simultaneous caries of the upper incisor teeth occurring in either sex between the ages of 14 and 17; after an interval of varying length the other teeth also become involved. (05 Mar 2000) |
| Dubreuilh | M.W., 20th century French dermatologist. See: precancerous melanosis of Dubreuilh. (05 Mar 2000) |
| Duchenne | Guillaume B.A., French neurologist, 1806-1875. See: Duchenne's disease, Duchenne's sign, Duchenne's syndrome, Duchenne-Aran disease, Aran-Duchenne disease, Duchenne-Erb paralysis, Duchenne dystrophy. (05 Mar 2000) |
| Duchenne dystrophy | The most common childhood muscular dystrophy, with onset usually before age 6. Characterised by symmetrical weakness and wasting of first the pelvic and crural muscles and then the pectoral and proximal upper extremity muscles; pseudohypertrophy of some muscles, especially the calf; heart involvement; sometimes mild mental retardation; progressive course and early death, usually in adolescence. X-linked inheritance (affects males and transmitted by females). Synonym: childhood muscular dystrophy, Duchenne's disease, pseudohypertrophic muscular dystrophy. (05 Mar 2000) |
| Duchenne muscular dystrophy | A specific form of muscular dystrophy that is inherited as a sex-linked recessive trait and thus confined to young males and to females with Turner's syndrome. One third of all cases are estimated to be new mutational events. See: dystrophin. It is characterised by degeneration and necrosis of skeletal muscle fibres, that are replaced by fat and fibrous tissue. Symptoms include muscle weakness and in some forms, the appearance of muscle enlargement (pseudo-hypertrophy). Advanced cases can include weakness of the respiratory muscles (compromising breathing) and cardiomyopathy. Inheritance: sex-linked recessive. Incidence: 1 in 4000 male births. (11 Nov 1997) |
| Duchenne's disease | The most common childhood muscular dystrophy, with onset usually before age 6. Characterised by symmetrical weakness and wasting of first the pelvic and crural muscles and then the pectoral and proximal upper extremity muscles; pseudohypertrophy of some muscles, especially the calf; heart involvement; sometimes mild mental retardation; progressive course and early death, usually in adolescence. X-linked inheritance (affects males and transmitted by females). Synonym: childhood muscular dystrophy, Duchenne's disease, pseudohypertrophic muscular dystrophy. (05 Mar 2000) |
| Duchenne's sign | <clinical sign> Falling in of the epigastrium during inspiration in paralysis of the diaphragm. (05 Mar 2000) |
| Duchenne's syndrome | <syndrome> Subacute or chronic anterior spinal paralysis combined with multiple neuritis. (05 Mar 2000) |
| Duchenne-Aran disease | A serious neurologic disease that results from the progressive degeneration of the motor neurons. (27 Sep 1997) |
| Duchenne-Erb paralysis | A type of brachial birth palsy in which there is paralysis of the muscles of the upper arm and shoulder girdle (deltoid, biceps, brachialis, and brachioradialis muscles) due to a lesion of the upper trunk of the brachial plexus or of the roots of the fifth and sixth cervical roots. Synonym: Duchenne-Erb paralysis, Erb paralysis. (05 Mar 2000) |
| duchesse d'angouleme | <botany> A variety of pear of large size and excellent flavor. Origin: F. Source: Websters Dictionary (01 Mar 1998) |
| duck | 1. <zoology> Any bird of the subfamily Anatinae, family Anatidae. The genera and species are numerous. They are divided into river ducks and sea ducks. Among the former are the common domestic duck (Anas boschas); the wood duck (Aix sponsa); the beautiful mandarin duck of China (Dendronessa galeriliculata); the Muscovy duck, originally of South America (Cairina moschata). Among the sea ducks are the eider, canvasback, scoter, etc. Bombay duck, a small aquatic mammal of Australia, having webbed feet and a bill resembling that of a duck (Ornithorhynchus anatinus). It belongs the subclass Monotremata and is remarkable for laying eggs like a bird or reptile; called also duckbill, platypus, mallangong, mullingong, tambreet, and water mole. 2. A sudden inclination of the bead or dropping of the person, resembling the motion of a duck in water. "Here be, without duck or nod, Other trippings to be trod." (Milton) Origin: OE. Duke, doke. Source: Websters Dictionary (01 Mar 1998) |
| duck embryo origin vaccine | See: rabies vaccine. (05 Mar 2000) |
| duck hepatitis virus | A DNA virus of the genus Hepadnavirus, in the family Hepadnaviridae, causing virus hepatitis of ducks. (05 Mar 2000) |