attenuation

attenuation is a   Noun

Definition:

[1] The act or process of making slender, or the state of being slender; emaciation.

[2] The act of attenuating; the act of making thin or less dense, or of rarefying, as fluids or gases.

[3] The process of weakening in intensity; diminution of virulence; as, the attenuation of virus.

Synonyms: