hyalohyphomycosis |
An infection caused by a fungus with hyaline (colourless) mycelium in tissue, e.g., species of Fusarium, Penicillium, and Scopulariopsis; circumstances for infections usually involve a decrease in body resistance due to surgery, indwelling catheters, steroid therapy, or immunosuppressive drugs or cytotoxins. Origin: hyalo-+ G. Hyphe, web, + mykes, fungus, + -osis, condition (05 Mar 2000) |
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hyaloid |
<anatomy> Resembling glass; vitriform; transparent; hyaline; as, the hyaloid membrane, a very delicate membrane inclosing the vitreous humor of the eye. Origin: Gr. Glassy, transparent; glass + appearance: cf. F. Hyaloide. Source: Websters Dictionary (01 Mar 1998) |
hyaloid artery |
<anatomy, artery> The terminal branch of the primitive ophthalmic artery, which forms in the embryo an extensive ramification in the primary vitreous and a vascular tunic around the lens; by 81/2 months, these vessels have atrophied almost completely, but a few persistent remnants are evident entoptically as muscae volitantes. Synonym: arteria hyaloidea. (05 Mar 2000) |
hyaloid body |
The transparent gel that fills the inner portion of the eyeball between the lens (lens, crystalline) and the retina. (12 Dec 1998) |
hyaloid canal |
A minute canal running through the vitreous from the discus nervi optici to the lens, containing in foetal life a prolongation of the central artery of the retina, the hyaloid artery. See: vitreous, hyaloid artery. Synonym: canalis hyaloideus, central canal of the vitreous, Cloquet's canal, Stilling's canal. (05 Mar 2000) |
hyaloid fossa |
A depression on the anterior surface of the vitreous body in which lies the lens. Synonym: fossa hyaloidea, lenticular fossa, patellar fossa of vitreous. (05 Mar 2000) |
hyaloid membrane |
A transparent homogeneous acellular layer between the substantia propria and the endothelial layer of the cornea; considered to be a highly developed basement membrane. Synonym: lamina limitans posterior corneae, membrana vitrea, Descemet's membrane, Duddell's membrane, entocornea, hyaloid membrane, lamina elastica posterior, limiting layers of cornea, membrana hyaloidea, posterior elastic layer, tunica vitrea, vitreous membrane. (05 Mar 2000) |
hyaloideoretinal degeneration |
Progressive liquefaction and destruction of the vitreous humor with grayish-white preretinal membranes, myopia, cataract, retinal detachment, and hyper-and hypopigmentation; autosomal dominant inheritance. Synonym: Wagner's disease, Wagner's syndrome. (05 Mar 2000) |
hyalomere |
The clear periphery of a blood platelet. Origin: hyalo-+ G. Meros, part (05 Mar 2000) |
Hyalomma |
An Old World genus (about 21 species) of large ixodid ticks with submarginal eyes, coalesced festoons, an ornate scutum, and a long rostrum. Adults parasitise all domestic animals and a wide variety of wild animals; larvae or nymphs may parasitise small mammals, birds, and reptiles. Species harbor a great variety of pathogens of humans and animals, and also cause considerable mechanical injury. Origin: hyalo-+ G. Omma, eye (05 Mar 2000) |
Hyalomma anatolicum |
Former name for Hyalomma anatolicum anatolicum. (05 Mar 2000) |
Hyalomma anatolicum anatolicum |
A subspecies infesting cattle, camels and horses in Asia, the Near and Middle East, southeastern Europe, and North Africa; it is a vector of bovine tropical theileriosis, of equine babesiosis, and of human Crimean-Congo haemorrhagic fever. (05 Mar 2000) |
Hyalomma marginatum |
A particularly common species of tick carried by birds migrating between Europe and Asia and Africa, and the probable vector of the virus of Crimean haemorrhagic fever. (05 Mar 2000) |
Hyalomma truncatum |
A species causing sweating sickness in cattle in Africa. (05 Mar 2000) |
Hyalomma variegatum |
Species of tick that is the vector of the viral agent of lymphocytic choriomeningitis in Ethiopia. (05 Mar 2000) |