单词	attenuation
释义	attenuation noun at·​ten·​u·​a·​tion ə-ˌten-yə-ˈwā-shən  -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 Medical Definition attenuation noun at·​ten·​u·​a·​tion ə-ˌten-yə-ˈwā-shən  : a decrease in the pathogenicity or vitality of a microorganism or in the severity of a disease Legal Definition attenuation noun at·​ten·​u·​a·​tion ə-ˌten-yu̇-ˈwā-shən  : a lessening of the amount, force, or magnitude of something specifically : a weakening of the connection between an illegal police procedure and the evidence obtained by it such that the evidence is admissible at trial as an exception to the exclusionary rule
随便看	bothy botnet boto Botocudo botocudos botogenin botonnée botonée botos Botox botoxed botoxing Botoşani botry- botrychia Botrychium botrychiums Botrydium botryllid Botryllus botryo- botryogen botryoidal botryoidder botryoiddest

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