| DSP | decreased sensory perception; delayed sleep phase; desmoplakin; dibasic sodium phosphate; digital si... |
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| ADSA | Arterial Digital Subtraction Angiography |
| DSA | Digital Subtraction Angiography = DVI |
| DVI | Digital Vascular Imaging = DSA |
| IDSA | Intravenous Digital Subtraction Angiography |
| cover-uncover test | A test to detect strabismus; the patient's attention is directed to a small fixation object, one eye is covered and after a few seconds, uncovered; if the uncovered eye moves to see the picture, strabismus is present. (05 Mar 2000) |
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| prism cover test | Measurement of the deviation in strabismus by the alternate cover test combined with neutralization for the deviation using prisms. (05 Mar 2000) |
| self-registering thermometer | A thermometer in which the maximum or minimum temperature, during the period of observation, is registered by means of a special appliance; in the clinical thermometer only the highest temperature is registered, usually by a steel bar above the column of mercury or by a segment of the mercury separated from the main column by a bubble of air; after the maximum temperature is registered, the bar or segment of mercury remains in place as the column of mercury contracts. (05 Mar 2000) |
| shaded riverine aquatic cover | Near-shore aquatic area occurring at the interface between a stream and adjacent woody habitat. (09 Oct 1997) |
| spirit thermometer | A thermometer filled with alcohol, used to measure extreme degrees of cold. (05 Mar 2000) |
| surface thermometer | A thermometer in the form of a disk or strip that indicates the temperature of the portion of the skin to which it is applied. (05 Mar 2000) |
| differential thermometer | <instrument, physics> An instrument for indicating changes of temperature without indicating the degree of heat by which it is affected; especially, an instrument contrived by Count Rumford which, as modified by Professor Leslie, was afterward called the differential thermometer. Origin: Thermo- + -scope. Source: Websters Dictionary (01 Mar 1998) |
| instream cover | Areas of shelter in a stream channel that provide aquatic organisms protection from predators or competitors and/or a place in which to rest and conserve energy due to a reduction in the force of the current. (09 Oct 1997) |
| overhead cover | Material (organic or inorganic) that provides protection to fish or other aquatic animals from above, generally includes material overhanging the stream less than a particular distance above the water surface. Values less than 0.5 m (1.5 feet) and less than 1 m (3 feet) have been used. (09 Oct 1997) |
| thermal cover | Vegetative condition, generally with greater than 70% canopy closure and 40 feet in height, that can significantly ameliorate weather effects such as wind, heat, cold, and snow. Used by wildlife in winter. (05 Dec 1998) |
| thermometer | <physics> An instrument for measuring temperature, founded on the principle that changes of temperature in bodies are accompained by proportional changes in their volumes or dimensions. The thermometer usually consists of a glass tube of capillary bore, terminating in a bulb, and containing mercury or alcohol, which expanding or contracting according to the temperature to which it is exposed, indicates the degree of heat or cold by the amount of space occupied, as shown by the position of the top of the liquid column on a graduated scale. See Centigrade, Fahrenheit, and Reaumur. To reduce degrees Fahrenheit to degrees Centigrade, substract 32 deg and multiply by 5/9; to reduce degrees Centigrade to degrees Fahrenheit, multiply by 9/5 and add 32 deg . Air thermometer, Balance thermometer, etc. See Air, Balance, etc. Metallic thermometer, a form of thermometer indicating changes of temperature by the expansion or contraction of rods or strips of metal. Register thermometer, or Self-registering thermometer, a thermometer that registers the maximum and minimum of temperature occurring in the interval of time between two consecutive settings of the instrument. A common form contains a bit of steel wire to be pushed before the column and left at the point of maximum temperature, or a slide of enamel, which is drawn back by the liquid, and left within it at the point of minimum temperature. Origin: Thermal. Source: Websters Dictionary (01 Mar 1998) |
| analog-digital conversion | The process of converting analog data such as continually measured voltage to discrete, digital form. (12 Dec 1998) |
| angiography, digital subtraction | A method of delineating blood vessels by subtracting a tissue background image from an image of tissue plus intravascular contrast material that attenuates the X-ray photons. The background image is determined from a digitised image taken a few moments before injection of the contrast material. The resulting angiogram is a high-contrast image of the vessel. This subtraction technique allows extraction of a high-intensity signal from the superimposed background information. The image is thus the result of the differential absorption of X-rays by different tissues. (12 Dec 1998) |
| annular part of fibrous digital sheath | One of the two circular fibrous bands of the fibrous sheaths of the fingers and toes attached to the shaft of the proximal and middle phalanges. Synonym: pars annularis vaginae fibrosae, annular pulley, annulus of fibrous sheath, ligamentum annulare digitorum. (05 Mar 2000) |
| radiography, dental, digital | A rapid, low-dose, digital imaging system using a small intraoral sensor instead of radiographic film, an intensifying screen, and a charge-coupled device. It presents the possibility of reduced patient exposure and minimal distortion, although resolution and latitude are inferior to standard dental radiography. A receiver is placed in the mouth, routing signals to a computer which images the signals on a screen or in print. It includes digitizing from X-ray film or any other detector. (12 Dec 1998) |