| RSD | reflex sympathetic dystrophy; relative standard deviation |
|---|---|
| SD | Sandhoff disease; senile dementia; septal defect; serologically defined; serologically detectable; s... |
| SDI | standard deviation interval; survey diagnostic instrument |
| SDS | same day surgery; school dental services; self-rating depression scale; sensory deprivation syndrome... |
| SDt | standard deviation of total scores |
mean cell hemoglobin (평균 적혈구 혈색소
| 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) |
| ICAO standard atmosphere | The standard atmosphere adopted by the International Civil Aviation Organization, used for calibrating altimeters and for expressing hypobaric chamber pressures in terms of equivalent altitude; it ignores many deviations found in nature. (05 Mar 2000) |
| emission standard | This regulatory value is a quantitative limit on the emission or discharge of a potentially toxic substance from a source. The simplest form for regulatory purposes is a uniform emission standard (UES) where the same limit is placed on all emissions of a particular contaminant. (09 Oct 1997) |
| environmental quality standard | This regulatory value defines the maximum concentration of a potentially toxic substance which can be allowed in an environmental compartment, usually air (air quality standard - AQS) or water, over a defined period. (09 Oct 1997) |
| arithmetic mean | The mean calculated by adding a set of values and then dividing the sum by the number of values. (05 Mar 2000) |
| calculated mean organism | A hypothetical organism whose characters are the means of both the positive and negative characters of the organism's which belong to the same taxon as the CMO, as opposed to the hypothetical mean. Organism. (05 Mar 2000) |
| geometric mean | The mean calculated as the antilogarithm of the arithmetic mean of the logarithms of the individual values; it can also be calculated as the nth root of the product of n values. (05 Mar 2000) |
| geometric mean diameter | A measure of the central tendency of particle size composition of substrate materials sometimes used as an index of the quality of spawning gravels. Also referred to as D50 size. (09 Oct 1997) |
| mean | <statistics> Average value calculated by taking the sum of all values and dividing by the total number of values. (05 Jan 1998) |
| mean annual increment | The annual average growth rate for a tree, computed over its entire life cycle. (05 Dec 1998) |
| mean arterial pressure | <cardiology, physiology> The average value for arterial pressure. Systolic pressure + diastolic pressure divided by 2. (27 Sep 1997) |
| mean calorie | One hundredth of the energy required to raise the temperature of 1 g of water from 0캜 to 100캜. (05 Mar 2000) |