| Scheibler's reagent | A solution of sodium tungstate in phosphoric acid used in tests for alkaloids. (05 Mar 2000) |
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| Scheie | Harold G., U.S. Ophthalmologist, *1909. See: Scheie's syndrome. (05 Mar 2000) |
| Scheie syndrome | <syndrome> Mucopolysaccharidosis (lysosomal disease) in which there is a defect in _ L iduronidase. Fibroblasts from Scheie syndrome patients do not cross correct fibroblasts from Hurler syndrome, although the two conditions are clinically distinct. (18 Nov 1997) |
| scheie's syndrome | <syndrome> A hereditary metabolic disorder caused by a recessive gene which results in a deficiency of the enzyme alpha-L-iduronidase, which breaks down dermatan sulphate and heparan sulphate, two types of mucopolysaccharides (complex carbohydrates). Consequently, the mucopolysaccharides accumulate in the cells of the body and cause damage. Symptoms include skeletal deformities, mental retardation, coronary artery disease, deafness, and stiff joints, among other things. There are mild and severe forms of the syndrome, the severe form is called Hurler syndrome, the mild form is called Scheie Syndrome, and children with an intermediate form have Hurler-Scheie Syndrome. Patients with the mild form generally suffer little to no mental retardation and survive to adulthood. There is presently no cure. Scheie's Syndrome is one of a number of related rare genetic mucopolysaccharide disorders, the most common being Hunter syndrome. (09 Oct 1997) |
| Scheiner | Christoph, German physicist, 1575-1650. See: Scheiner's experiment. (05 Mar 2000) |
| Scheiner's experiment | A demonstration of accommodation; through two minute holes in a card, separated from each other by less than the diameter of the pupil, one looks at a pin; at a short distance from the eye the pin appears double; as it is moved from the eye a point is found where it appears single, and beyond which it remains single for the emmetropic eye, but for the myopic eye it soon again becomes double. (05 Mar 2000) |
| Schellong | Fritz, German physician, 1891-1953. See: Schellong test, Schellong-Strisower phenomenon. (05 Mar 2000) |
| Schellong test | A test for circulatory function; the subject is required to stand for 10 to 20 minutes, during which time the blood pressure is measured continuously; a fall of systolic pressure of 20 mm Hg or more indicates poor circulatory function. (05 Mar 2000) |
| Schellong-Strisower phenomenon | A reduction of the systolic blood pressure, accompanied sometimes by vertigo, on rising from the horizontal to the erect posture. (05 Mar 2000) |
| schelly | <zoology> The powan. Source: Websters Dictionary (01 Mar 1998) |
| schema | 1. A plan, outline, or arrangement. Synonym: scheme. 2. In sensorimotor theory, the organised unit of cognitive experience. Origin: G. Schema, shape, form (05 Mar 2000) |
| schematic | Made after a definite type of formula; representing in general, but not with absolute exactness; denoting an anatomical drawing or model. Origin: G. Schematikos, in outward show, fr. Schema, shape, form (05 Mar 2000) |
| schematic eye | The representation of the optical system of an ideal normal eye in which are listed the curvatures and indices of refraction of the refracting elements and their intervening distances. (05 Mar 2000) |
| schematism | 1. <astronomy> Combination of the aspects of heavenly bodies. 2. Particular form or disposition of a thing; an exhibition in outline of any systematic arrangement. Origin: Cf. F. Schematisme (cf. L. Schematismos florid speech), fr. Gr, fr. To form. See Scheme. Source: Websters Dictionary (01 Mar 1998) |
| schematograph | An instrument for making a tracing in reduced size of the outline of the body. Origin: G. Schema, form, + grapho, to write (05 Mar 2000) |