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noun
1.
the act of attenuating or the state of being attenuated.
2.
the process by which a virus, bacterium, etc., changes under laboratory conditions to become harmless or less virulent.
3.
Physics. a decrease in a property, as energy, per unit area of a wave or a beam of particles, occurring as the distance from the source increases as a result of absorption, scattering, spreading in three dimensions, etc.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Attenuation
is always a great word to know.
So is cosmic ray. Does it mean:
| a radiation of high penetrating power that originates in outer space and consists partly of high-energy atomic nuclei |
| of or pertaining to the molecular force within a body or substance acting to unite its parts |
Example Sentences
- By no mechanical process can the baser metals be made to undergo such attenuation.
- In retrospect, its small pages and large type seem indicative of the attenuation of the story itself.
Collins
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Etymonline
Word Origin & History
attenuation
1590s, from L. attenuationem (nom. attenuatio), noun of action from attenuatus, pp. of attenuare (see attenuate).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary
attenuation at·ten·u·a·tion (ə-těn'y&oomacr;-ā'shən)
n.
A dilution, thinning, or weakening of a substance, especially a reduction in the virulence of a pathogen through repeated inoculation, growth in a different culture medium, or exposure to heat, light, air or other weakening agents.
The energy loss of an ultrasonic beam as it passes through a material.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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FOLDOC
Computing Dictionary
attenuation definition
communicationsThe progressive reduction in amplitude of a signal as it travels farther from the point of origin.
For example, an electric signal's amplitude reduces with distance due to electrical impedance. Attenuation is usually measured in decibels [per metre?].
Attenuation does not imply appreciable modification of the shape of the waveform (distortion), though as the signal amplitude falls the signal-to-noise ratio will also fall unless the channel itself is noise free or the signal is amplified at some intermediate point(s) along the channel.
["Networking Essentials, second edition", Microsoft Corporation, pub. Microsoft Press 1997].
(2003-07-29)
Word Dynamo Rating For Attenuation
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