| effective temperature | A comfort index or scale which takes into account the temperature of air, its moisture content, and movement. (05 Mar 2000) |
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| effective temperature index | A composite index of environmental comfort which is compared after exposure to different combinations of air temperature, humidity, and movement. (05 Mar 2000) |
| Amsler's chart | A 10-cm square divided into 5-mm squares upon which an individual may project a defect in the central visual field. (05 Mar 2000) |
| chart | 1. A recording of clinical data relating to a patient's case. Synonym: curve. 3. In optics, symbols of graduated size for measuring visual acuity, or test types for determining far or near vision. See: Snellen's test types. Origin: L. Charta, sheet of papyrus (05 Mar 2000) |
| Walker's chart | A system of plotting the relative foetal and placental sizes. (05 Mar 2000) |
| quality control chart | A chart illustrating the allowable limits of error in laboratory test performance, the limits being a defined deviation from the mean of a control serum, most commonly ±2 SD. See: quality control. (05 Mar 2000) |
| isometric chart | A chart or graph that displays three dimensions on a plane surface. (05 Mar 2000) |
| Tanner growth chart | A series of chart's showing distribution of parameters of physical development, such as stature, growth curves, and skinfold thickness, for children by sex, age, and stages of puberty. (05 Mar 2000) |
| aperture, effective | <microscopy> The diameter of the entrance pupil: it is the apparent diameter of the limiting aperture measured from the front. (05 Aug 1998) |
| renal blood flow, effective | The amount of blood flowing to the parts of the kidney that are involved with the production of constituents of urine. It is that portion of the total renal blood flow that perfuses functional renal tissue (e.g., the glomeruli). It should be differentiated from renal plasma flow, effective which is based on the amount of plasma rather than on total renal blood. (12 Dec 1998) |
| median effective dose | The dose that produces the desired effect; when followed by a subscript (generally "ED50"), it denotes the dose having such an effect on a certain percentage (e.g., 50%) of the test animals; ED50 is the median effective dose, in radiation protection, the sum of the equivalent doses in all tissues and organs of the body weighted for tissue effects of radiation. The unit of effective dose is the sievert (Sv), epilation dose, the minimum amount of radiation sufficient to produce hair loss, usually in 10 to 14 days. (05 Mar 2000) |
| cost-effective | A term describing a resource that is available within the time it is needed and is able to meet or reduce electrical power demand at an estimated incremental system cost no greater than that of the least-costly, similarly reliable and available alternative. (05 Dec 1998) |
| effective | Producing the intended result. (18 Nov 1997) |
| effective collision radius | <radiobiology> Effective size of a particle equal to the square root of (cross-section/pi). Determines the effective range of interaction of the particle. (09 Oct 1997) |
| effective conjugate | The internal conjugate measured from the nearest lumbar vertebra to the symphysis, in spondylolisthesis. Synonym: false conjugate. (05 Mar 2000) |