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attenuation

noun

at·​ten·​u·​a·​tion ə-ˌten-yə-ˈwā-shən How to pronounce attenuation (audio)
-yü-ˈā-
plural attenuations
: the act or process of attenuating something or the state of being attenuated: such as
a
: a lessening in amount, force, magnitude, or value : weakening
Sound can travel thousands of kilometers in this planar acoustic waveguide with little attenuation. David Ritchie
b
: a reduction of severity or virulence : a decrease in the pathogenicity of a microorganism or in the severity of a disease
This virus grew well in tissue culture, with only limited temperature sensitivity as a marker of possible attenuation. Peter F. Wright
c
: diminution of thickness
The detailing of the doorway, the narrowness and attenuation of the columns of the portico, and most especially the paneling and ornamentation in the interior … bespeak the neoclassical, somewhat similar to the plaster work found in Baltimore interiors. Jessie Poesch

Word History

First Known Use

1559, in the meaning defined above

Time Traveler
The first known use of attenuation was in 1559

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