| Raman spectrum | The characteristic array of light produced by the Raman effect. (05 Mar 2000) |
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| spectrum analysis, raman | Analysis of the intensity of raman scattering of monochromatic light as a function of frequency of the scattered light. (12 Dec 1998) |
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| raman effect | <radiobiology> A phenomenon observed in the scattering of light as it passes through a transparent medium, the light undergoes a change in frequency and a random alteration in phase due to a change in rotational or vibrational energy of the scattering molecules. (09 Oct 1997) |
| Raman, Sir Chandrasekhara | <person> Indian physicist and Nobel laureate, 1888-1970. See: Raman effect, Raman spectrum. (05 Mar 2000) |
| absorption spectrum | <chemistry> A graph of the amount of light a substance absorbs, plotted as a fuction of energy, frequency or wavelength. (15 Jan 1998) |
| antimicrobial spectrum | See: spectrum. (05 Mar 2000) |
| broad spectrum | <pharmacology> Often used to describe an antibiotic that is effective against a wide range of microorganisms. (13 Nov 1997) |
| broad spectrum antibiotic | An antibiotic having a wide range of activity against both Gram-positive and Gram-negative organisms. (05 Mar 2000) |
| visible spectrum | That part of electromagnetic radiation that is visible to the human eye; it extends from extreme red, 7606 A |
| chromatic spectrum | The continuum of colours that white light forms on passing through a prism or diffraction grating. Synonym: colour spectrum. (05 Mar 2000) |
| colour spectrum | The continuum of colours that white light forms on passing through a prism or diffraction grating. Synonym: colour spectrum. (05 Mar 2000) |
| wide spectrum | See: spectrum. (05 Mar 2000) |
| continuous spectrum | A spectrum in which there are no absorption bands or lines. (05 Mar 2000) |
| spectrum | A charted band of wavelengths of electromagnetic vibrations obtained by refraction and diffraction. By extension, a measurable range of activity, such as the range of bacteria affected by an antibiotic (antibacterial spectrum) or the complete range of manifestations of a disease. (18 Nov 1997) |
| spectrum analysis | The measurement of the amplitude of the components of a complex waveform throughout the frequency range of the waveform. (12 Dec 1998) |
| spectrum analysis, mass | Analysis of the mass of an object through means of determining the wave length(s) at which electromagnetic energy is absorbed by that object. (12 Dec 1998) |