Also found in: Thesaurus, Medical, Legal, Encyclopedia, Wikipedia.


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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


[əˈtenjʊeɪtɪŋ] ADJatenuante
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005
References in periodicals archive ?
CPI Aerostructures (CVU) announced that it has received a long term agreement from Honda Aircraft Company (HMC) to manufacture the noise attenuating engine inlet for its recently debuted HondaJet Elite business jet.
MONDAY, March 5, 2018 (HealthDay News) -- Other dietary components have a minimal impact on attenuating the adverse association of dietary sodium with blood pressure (BP), according to a study published online March 5 in Hypertension.
Pharmacological profiles of sinomenine in treatment of CKD are of multitarget.Sinomenine could activate Nrf2 signaling to prevent hyperactive inflammation and kidney injury [26], meanwhile attenuating renal fibrosis through Nrf2-mediated inhibition of oxidative stress and TGF-^ signaling [11] and alleviating high glucose-induced renal glomerular endothelial hyperpermeability [27].
831) examined several models, seeking simple parametric models that fit attenuating exposure--response data well.
These data suggest that a tyrosine kinase inhibitor may prove useful in attenuating A[beta]-dependent microgliosis and proinflammatory changes in the brain.
A closed-cell sound attenuating blanket is rolled out and glued down directly on top of the level concrete slab.