Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
1. the series of images resulting from the refraction of electromagnetic radiation (e.g., light, x-rays) and their arrangement according to frequency or wavelength.
2. range of activity, as of an antibiotic, or of manifestations, as of a disease. adj., adj spec´tral.
absorption spectrum one obtained by passing radiation with a continuous spectrum through a selectively absorbing medium.
broad-spectrum effective against a wide range of microorganisms.
visible spectrum that portion of the range of wavelengths of electromagnetic vibrations (from 770 to 390 nanometers) which is capable of stimulating specialized sense organs and is perceptible as light.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
the spectrum observed after light has passed through, and been partially absorbed by, a solution or translucent substance; many molecular groupings have characteristic light absorption patterns, which can be used for detection and quantitative assay.
Farlex Partner Medical Dictionary © Farlex 2012
absorption spectrumThe range of light a substance absorbs, plotted as a function of energy, frequency or wavelength.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
ab·sorp·tion spec·trum(ăb-sōrp'shŭn spek'trŭm)
The spectrum observed after light has passed through, and been partially absorbed by, a solution or translucent substance. Many molecular groupings have characteristic light absorption patterns, which can be used for detection and quantitative assay.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
absorption spectrumthat wavelength of the light spectrum which is absorbed by a pigment. For example, chlorophyll (see Fig. 9 absorbs red and blue light and thus appears green. See ACTION SPECTRUM.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005