v. & adj.
--v.tr.
1. make thin.
2 reduce in force, value, or virulence.
3 Electr. reduce the amplitude of (a signal or current).
--adj.
1. slender.
2 tapering gradually.
3 rarefied.
Derivatives:
attenuated adj. attenuation n. attenuator n.
Etymology: L attenuare (as AD-, tenuis thin)