| duck influenza virus | An influenza A virus, a member of the family Orthomyxoviridae, distinct from human influenza A strains on bases of haemagglutination-inhibition. (05 Mar 2000) |
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| duck plague | A viral enteritis of ducks and other waterfowl in Europe, Asia, and the U.S. Caused by an anatid herpes virus 1; manifested by weakness, lethargy, and diarrhoea accompanied by catarrhal haemorrhagic enteritis and echymotic haemorrhages in organs and muscles. Synonym: duck viral enteritis. (05 Mar 2000) |
| duck plague virus | A herpesvirus that causes duck plague. (05 Mar 2000) |
| duck viral enteritis | A viral enteritis of ducks and other waterfowl in Europe, Asia, and the U.S. Caused by an anatid herpes virus 1; manifested by weakness, lethargy, and diarrhoea accompanied by catarrhal haemorrhagic enteritis and echymotic haemorrhages in organs and muscles. Synonym: duck viral enteritis. (05 Mar 2000) |
| duck viral hepatitis | An acute, highly contagious disease of young ducklings caused by an enterovirus and characterised by lethargy, spasmodic paddling and rapid death. (05 Mar 2000) |
| duck's-bill | <zoology> Having the form of a duck's bill. Duck's-bill limpet, a limpet of the genus Parmaphorus; so named from its shape. (04 Mar 1998) |
| duck's-foot | <botany> The May apple (Podophyllum peltatum). Source: Websters Dictionary (01 Mar 1998) |
| duck's-meat | <botany> Duckweed. Source: Websters Dictionary (01 Mar 1998) |
| duckbill | 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) |
| duckbill speculum | A bivalve speculum, the blades of which are broad and flattened, resembling a duck's bill, used in inspection of the vagina and cervix. (05 Mar 2000) |
| duckweed | <botany> A genus (Lemna) of small plants, seen floating in great quantity on the surface of stagnant pools fresh water, and supposed to furnish food for ducks. Synonym: duckmeat. Source: Websters Dictionary (01 Mar 1998) |
| Duckworth's phenomenon | Respiratory arrest before cardiac arrest as a result of intracranial disease. (05 Mar 2000) |
| Duckworth, Sir Dyce | <person> English physician, 1840-1928. See: Duckworth's phenomenon. (05 Mar 2000) |
| Ducrey test | An intradermal test, using inactivated Haemophilus ducreyi, for diagnosis of chancroid; a positive delayed reaction is indicative of present or past infection; false-positive results occur. Synonym: Ito-Reenstierna test. (05 Mar 2000) |
| Ducrey's bacillus | <bacteria> A species of haemophilus that appears to be the pathogen or causative agent of the sexually transmitted disease, chancroid. (12 Dec 1998) |