| standard solution | Standardised solution, a solution of known concentration, used as a standard of comparison or analysis. (05 Mar 2000) |
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| standard state | <chemistry> The most stable form of a substance at 298 K and 1 atmosphere of pressure. (09 Jan 1998) |
| standard substance | A pure, authentic substance used for identification purposes. (05 Mar 2000) |
| standard temperature | A temperature of 0캜 or 273.15 |
| standard urea clearance | The value obtained when the square root of the urine flow (when below 2 ml/min) is multiplied by the urine urea concentration and divided by the whole blood urea concentration; represents an old empirical adjustment for the effect of low urine flow on urea excretion; sometimes corrected for body size by dividing by some function of body weight or surface area. Later, plasma concentration was substituted for blood concentration in the calculation. The normal value is about 54 ml/min per 1.73 m2 in an adult person. Synonym: Van Slyke's formula. (05 Mar 2000) |
| standard volume | The volume of an ideal gas at standard temperature and pressure, approximately 22.414 liters. (05 Mar 2000) |
| standard-wing | <zoology> A curious paradise bird (Semioptera Wallacii) which has two long special feathers standing erect on each wing. Source: Websters Dictionary (01 Mar 1998) |
| standardise | To compare with or conform to a standard, to establish standards. (18 Nov 1997) |
| standardised mortality ratio | The ratio of the number of events observed in a population to the number that would be expected if the population had the same distribution as a standard or reference population. (05 Mar 2000) |
| standardization | 1. The making of a solution of definite strength so that it may be used for comparison and in tests. 2. Making any drug or other preparation conform to the type or standard. 3. A set of techniques used to remove as far as possible the effects of differences in the age or other confounding variables when comparing two or more populations. Standardization of a test, in psychology, the following of definite procedures for administering, scoring, evaluating, and reporting the results of a new test which is under development. (05 Mar 2000) |
| standardize | <chemistry> To reduce to a normal standard; to calculate or adjust the strength of, by means of, and for uses in, analysis. Source: Websters Dictionary (01 Mar 1998) |
| standards and guidelines | Bounds or constraints within which all practices in a given area will be carried out, in achieving the goals and objectives for that area. Standards and guidelines provide environmental safeguards and also describe constraints prescribed by law. (05 Dec 1998) |
| standby pulse generator | A generator which suppresses its output in response to natural ventricular activity but which, in the absence of such activity, functions as an asynchronous pulse generator. Synonym: demand pulse generator, standby pulse generator. (05 Mar 2000) |
| standel | A young tree, especially one reserved when others are cut. Source: Websters Dictionary (01 Mar 1998) |
| standergrass | <botany> A plant (Orchis mascula); called also standerwort, and long purple. See Long purple, under Long. Source: Websters Dictionary (01 Mar 1998) |