| waag | <zoology> A monkey of the upper Nile and Abyssinia (Cercopithecus griseoviridis), having the upper parts dull green, the lower parts white, the hands, ears, and face black. It was known to the ancient Egyptians. Synonym: tota. Origin: Cf. F. Grivet. Source: Websters Dictionary (01 Mar 1998) |
|---|---|
| Waage, P | <person> Norwegian chemist, 1833-1900. See: Guldberg-Waage law. (05 Mar 2000) |
| waahoo | <botany> The burning bush; said to be called after a quack medicine made from it. Source: Websters Dictionary (01 Mar 1998) |
| Waaler, Erik | <person> 20th century Norwegian biologist. See: Rose-Waaler test. (05 Mar 2000) |
| Waardenburg syndrome | <syndrome> Rare, autosomal dominant disease with variable penetrance and several known clinical types. Clinical features include depigmentation of the skin and hair with a white forelock, congenital cochlear deafness, heterochromia iridis or hypochromia iridis, medial eyebrow hyperplasia, hypertrophy of the nasal root producing increased width of the root of the nose, dystopia canthorum, lateral dystopia of medial canthi and lacrimal puncta and synophrys. The underlying cause may be defective development of the neural crest (neurocristopathy). Waardenburg's syndrome may be closely related to piebaldism. Klein-waardenburg syndrome refers to a disorder that also includes upper limb abnormalities. Inheritance: audosomal dominant. (21 Jun 2000) |
| Waardenburg, Petrus Johannes | <person> Dutch ophthalmologist, 1886-1979. See: Waardenburg syndrome. (05 Mar 2000) |
| Wachendorf's membrane | Remnants of the central portion of the anterior layer of the iris stroma (the iridopupillary lamina) which occludes the pupil in foetal life, and normally atrophies about the seventh month of gestation. Persistent strands usually stretch across the pupil from one iris collarette to the other, without touching the pupillary margin. Failure to regress is a rare cause of congenital blindness. Synonym: membrana pupillaris, Wachendorf's membrane. (05 Mar 2000) |
| Wachendorf, Eberhard | <person> German botanist and anatomist, 1702-1758. See: Wachendorf's membrane. (05 Mar 2000) |
| Wachstein, Max | <person> U.S. Histologist and pathologist, 1905-1965. See: Wachstein-Meissel stain for calcium-magnesium-ATPase. (05 Mar 2000) |
| Wachstein-Meissel stain | <technique> For calcium-magnesium-ATPase, a method similar to that of Gomori's non-specific acid phosphatase stain, except that incubation is carried out with ATP as substrate at neutral pH; enzyme activity is generally demonstrated at cell membranes. (05 Mar 2000) |
| Wachter, Herman | <person> German pathologist, *1878. See: Bracht-Wachter lesion. (05 Mar 2000) |
| wacky | <geology> A soft, earthy, dark-coloured rock or clay derived from the alteration of basalt. Origin: G. Wacke, MHG.wacke a large stone, OHG. Waggo a pebble. Source: Websters Dictionary (01 Mar 1998) |
| Wada test | <investigation> Unilateral internal carotid injection of amobarbital to determine the laterality of speech; injection on the dominant side causes transient aphasia or mutism; used prior to surgical treatment of epilepsy. (05 Mar 2000) |
| Wada, J | <person> 20th century Japanese-Canadian neurologist. See: Wada test. (05 Mar 2000) |
| wadd | <chemical> An earthy oxide of manganese, or mixture of different oxides and water, with some oxide of iron, and often silica, alumina, lime, or baryta; black ocher. There are several varieties. Plumbago, or black lead. Source: Websters Dictionary (01 Mar 1998) |