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v. at·ten·u·at·ed, at·ten·u·at·ing, at·ten·u·ates
1. To make slender, fine, or small: The drought attenuated the river to a narrow channel.
2. To reduce in force, value, amount, or degree; weaken: Medicine attenuated the fever's effect.
3. To lessen the density of; rarefy.
4. Biology To make (bacteria or viruses) less virulent.
5. Electronics To reduce (the amplitude of an electrical signal) with little or no distortion.
To become thin, weak, or fine.
adj. (-yo͞o-ĭt)
1. Reduced or weakened, as in strength, value, or virulence.
2. Botany Gradually tapering to a slender point.

[Latin attenuāre, attenuāt- : ad-, ad- + tenuāre, to make thin (from tenuis, thin; see ten- in Indo-European roots).]

at·ten′u·a′tion n.


1. the act of attenuating or the state of being attenuated
2. (General Physics) the loss of energy suffered by radiation as it passes through matter, esp as a result of absorption or scattering


(əˌtɛn yuˈeɪ ʃən)

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.
[1585–95; (< Middle French) < Latin]


1. Decrease in intensity of a signal, beam, or wave as a result of absorption of energy and of scattering out of the path of a detector, but not including the reduction due to geometric spreading, i.e., the inverse square of distance effect.
2. In mine warfare, the reduction in intensity of an influence as distance from the source increases.
3. In camouflage and concealment, the process of making an object or surface less conspicuous by reducing its contrast to the surroundings and/or background. Also called tone down.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.attenuation - weakening in force or intensity; "attenuation in the volume of the sound"
weakening - becoming weaker
2.attenuation - the property of something that has been weakened or reduced in thickness or density
weakness - the property of lacking physical or mental strength; liability to failure under pressure or stress or strain; "his weakness increased as he became older"; "the weakness of the span was overlooked until it collapsed"


The depletion or sapping of strength or energy:


[əˌtenjʊˈeɪʃən] Natenuación f, disminución f


n (= weakening)Abschwächen nt, → Abschwächung f; (of statement also)Abmildern nt, → Abmilderung f; (= making thinner)Verdünnung f


n. atenuación, acto de disminución, esp. de una virulencia.
References in classic literature ?
I saw him look at the loaf at supper (which happened to be a small one), as if nothing else stood between us and famine; and when my aunt insisted on his making his customary repast, I detected him in the act of pocketing fragments of his bread and cheese; I have no doubt for the purpose of reviving us with those savings, when we should have reached an advanced stage of attenuation.
The transition was so sudden, without shade, without gradation of light, without attenuation of the luminous waves, that the orb seemed to have been extinguished by a powerful blow.
Another key feature of these attenuators is that the attenuation level is adjusted using a micrometer, enabling repeatable and rapid re-setting to different attenuation levels.
The objective of the present analysis was to examine exposure errors for multiple pollutants and provide insights on the potential for bias and attenuation of effect estimates in single- and bipollutant epidemiologic models.
Then ultrasonic diagnosis as a novel technique was performed to investigate the influences of the PA6 concentration and the HDPE-g-MAH content on the ultrasonic velocity and attenuation.
The losses from the interconnect that cause attenuation result in less signal at the receiver.
The group focused on growth attenuation rather than on the broader "Ashley Treatment," which also included a hysterectomy and breast bud removal.
In the intermediate region, bubble resonance dominates, with time-dependent changes in attenuation arising from the ripening of bubbles within the dough.
Key words: attenuation, ultrasound technique, composite panel sound barriers, textile waste,
Based on the findings given by previous researchers, we presumed that the species, leaf shape, leaf tactility, and other biological factors may affects the foliage's ability to achieve noise attenuation.
The column performed much better on the attenuation of HAPs (Table 1).
There also was no relationship between the duration of the vegan diet and ultrasound attenuation results.