Definition of Atenuation
At*ten`u*a"tion (&?;), n. [L.
attenuatio: cf. F. atténuation.] 1.
The act or process of making slender, or the state of being slender;
emaciation.
2. The act of attenuating; the act of making thin
or less dense, or of rarefying, as fluids or gases.
3. The process of weakening in intensity;
diminution of virulence; as, the attenuation of virus.
- Webster's Unabridged Dictionary (1913)
- To lessen the amount, force, magnitude, or value of something.
- (Biology) A mechanism in the regulation of gene expression. A decrease in the ability of a pathogen (like a virus or disease-causing bacteria) to cause disease.
- (Ecology, geochemistry) The ability to withhold contaminants in soil and
- (Physical oceanography) Light attenuation is the decrease in light intensity with depth in the water column due to absorption (by water molecules) and scattering (by suspended particulates).
- (Telecommunication), The decrease in intensity of a signal, beam, or wave as a result of absorption of energy and of scattering out of the path to the detector, but not including the reduction due to geometric spreading.
- The Nuttall Encyclopedia
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