| bark louse | <zoology> An insect of the family Coccidae, which infests the bark of trees and vines. The wingless females assume the shape of scales. The bark louse of vine is Pulvinaria innumerabilis; that of the pear is Lecanium pyri. See Orange scale. Source: Websters Dictionary (01 Mar 1998) |
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| sea louse | <zoology> Any one of numerous species of isopod crustaceans of Cymothoa, Livoneca, and allied genera, mostly parasites on fishes. Source: Websters Dictionary (01 Mar 1998) |
| sea wood louse | <zoology> A sea slater. Source: Websters Dictionary (01 Mar 1998) |
| typhus, epidemic louse-borne | The classic form of typhus, caused by rickettsia prowazekii, which is transmitted from man to man by the louse pediculus humanus corporis. This disease is characterised by the sudden onset of intense headache, malaise, and generalised myalgia followed by the formation of a macular skin eruption and vascular and neurologic disturbances. (12 Dec 1998) |
| typhus, louse-borne | See Typhus, epidemic. (12 Dec 1998) |
| flea-louse | <zoology> A jumping plant louse of the family Psyllidae, of many species. That of the pear tree is Psylla pyri. Source: Websters Dictionary (01 Mar 1998) |
| louse | Origin: OE. Lous, AS. Ls, pl. Ls; akin to D. Luis, G. Laus, OHG. Ls, Icel. Ls, Sw. Lus, Dan. Luus; perh. So named because it is destructive, and akin to E. Lose, loose. <zoology> 1. Any one of numerous species of small, wingless, suctorial, parasitic insects belonging to a tribe (Pediculina), now usually regarded as degraded Hemiptera. To this group belong of the lice of man and other mammals; as, the head louse of man (Pediculus capitis), the body louse (P. Vestimenti), and the crab louse (Phthirius pubis), and many others. See Crab louse, Dog louse, Cattle louse, etc, under Crab, Dog, etc. 2. Any one of numerous small mandibulate insects, mostly parasitic on birds, and feeding on the feathers. They are known as Mallophaga, or bird lice, though some occur on the hair of mammals. They are usually regarded as degraded Pseudoneuroptera. See Mallophaga. 3. Any one of the numerous species of aphids, or plant lice. See Aphid. 4. Any small crustacean parasitic on fishes. See Branchiura, and Ichthvophthira. The term is also applied to various other parasites; as, the whale louse, beelouse, horse louse. <zoology> Louse fly, any one of numerous species of mites which infest mammals and birds, clinging to the hair and feathers like lice. They belong to Myobia, Dermaleichus, Mycoptes, and several other genera. Source: Websters Dictionary (01 Mar 1998) |
| louse-borne typhus | A severe acute disease with prolonged high fever up to 40 |
| louse flies | Pupiparous, dorsoventrally flattened dipterous ectoparasites of the family Hippoboscidae. See: Hippobosca, Melophagus. (05 Mar 2000) |
| acetone body | <biochemistry> Any of the three compounds created by acetyl coenzyme A (acetoacetate, hydroxybutyrate, and acetone) which are water-soluble cellular fuels normally exported by the liver. They can build up in the blood and body tissues because of starvation, untreated diabetes mellitus, or other disorders that interfere with carbohydrate metabolism. The body rids itself of ketones mainly through urine, but it rids itself of acetone through the lungs, which gives the breath a characteristic fruity odour. If ketones build up in the body long enough, they cause serious illness and coma (see ketoacidosis.) (09 Oct 1997) |
| acute inclusion body encephalitis | The most common acute encephalitis, caused by HSV-1; affects persons of any age; preferentially involves the inferomedial portions of the temporal lobe and the orbital portions of the frontal lobes; pathologically, severe haemorrhagic necrosis is present along with, in the acute stages, intranuclear eosinophilic inclusion bodies in the neurons and glial cells. Synonym: acute inclusion body encephalitis, herpes encephalitis. (05 Mar 2000) |
| adrenal body | See adrenal gland. (12 Dec 1998) |
| alveolar body | That portion of bone in either the maxilla or the mandible which surrounds and supports the teeth. (12 Dec 1998) |
| amygdaloid body | Almond-shaped group of basal nuclei anterior to the inferior horn of the lateral ventricle of the brain, within the temporal lobe. The amygdala is part of the limbic system. (12 Dec 1998) |
| amylogenic body | A plant plastid involved in the synthesis and storage of starch. Found in many cell types, but particularly storage tissues. Characteristically has starch grains in the plastid stroma. (18 Nov 1997) |