| RAI | radioactive iodine; radioactive isotope; resident assessment instrument; resting ankle index; right ... |
|---|---|
| PCC | Pasteur Culture Collection; percutaneous cecostomy; pheochromocytoma; phosphate carrier compound; pl... |
| 198AU | Radioactive Gold(used in interstitial radio theraphy) |
| 167Ga | radioactive Gallium(used in whole-body & brain scans) |
| 131I | radioactive Iodine(used in Thyroid uptake, Liver & Kidney Scans & Treatment of malignant & nonmalig... |
| RAI | Radioactive iodine |
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| RAIU | Radioactive iodine uptakes |
| C 48/80 | Compound 48/80 |
| CAP | Compound Action Potential |
| CMAP | Compound motor action potential |
| Politzer's luminous cone | A triangular area at the anterior inferior part of the tympanic membrane, running from the umbo to the periphery, where there is seen a bright reflection of light. Synonym: cone of light, light reflex, Politzer's luminous cone, red reflex, Wilde's triangle. Malacarne's pyramid, a lobule on the undersurface of the cerebellum, the posterior portion of the vermis. (05 Mar 2000) |
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| luminous | 1. Shining; emitting or reflecting light; brilliant; bright; as, the is a luminous body; a luminous colour. "Fire burneth wood, making it . . . Luminous." (Bacon) "The mountains lift . . . Their lofty and luminous heads." (Longfellow) 2. Illuminated; full of light; bright; as, many candles made the room luminous. "Up the staircase moved a luminous space in the darkness." (Longfellow) 3. Enlightened; intelligent; also, clear; intelligible; as, a luminous mind. " Luminous eloquence." . " A luminous statement." Luminous paint, a paint made up with some phosphorescent substance, as sulphide of calcium, which after exposure to a strong light is luminous in the dark for a time. Synonym: Lucid, clear, shining, perspicuous. Luminously, Luminousness. Origin: L. Luminosus, fr. Lumen light: cf. F. Lumineux. See Luminary, Illuminate. Source: Websters Dictionary (01 Mar 1998) |
| luminous flux | The quantity of light emitted from a point source in a given time; its unit is the lumen. (05 Mar 2000) |
| luminous intensity | The luminous flux per unit solid angle in a given direction. Synonym: candle-power, radiant intensity. (05 Mar 2000) |
| luminous retinoscope | <instrument> A portable optical device providing either a circular or linear (streak) beam of light. (05 Mar 2000) |
| air pollutants, radioactive | Pollutants, present in air, which exhibit radioactivity. (12 Dec 1998) |
| radioactive | Giving off radiation. (12 Dec 1998) |
| radioactive atom | <chemistry, physics> An atom with an unstable nucleus, which emits particulate or electromagnetic radiation (radioactive emission) to achieve greater stability. See: radionuclide, half-life, Becquerel. (05 Mar 2000) |
| radioactive constant | <physics, radiobiology> The fraction of the amount of a radionuclide that undergoes transition per unit time. Formally: Lamda=dP/dt Where dP is the probability of a given nucleus undergoing spontaneous nuclear transition in the time interval dt. (16 Dec 1997) |
| radioactive contamination | <radiobiology> Radioactive substance dispersed in material or places where it is undesirable. (16 Dec 1997) |
| radioactive cow | Colloquialism for radionuclide generator. See: cow. (05 Mar 2000) |
| radioactive decay | <physics> The process by which a spontaneous change in nuclear state takes place. This process is accompanied by the emission of energy in various specific combinations of electromagnetic and corpuscular radiation and neutrinos. (16 Dec 1997) |
| radioactive equilibrium | <radiobiology> That condition in which the activities of the members of a radioactive chain decrease exponentially in time with the half-life of the chain precursor. Such radioactive equilibrium is only possible when the half-life of the precursor is longer than that of any other chain member. If the precursor half-life is so long that the change in the precursor population during the period of interest can be ignored, all the activities become sensibly equal and the equilibrium is said to be secular, otherwise it is said to be transient. (16 Dec 1997) |
| radioactive fallout | The material that descends to the earth or water well beyond the site of a surface or subsurface nuclear explosion. (12 Dec 1998) |
| radioactive iodide uptake test | A test of thyroid function in which 131I-iodide is given orally; after 24 hours, the amount present in the thyroid gland is measured and compared with normal values. Synonym: radioactive iodide uptake test, RAI test. (05 Mar 2000) |
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