At-tĕn/ū-ā'tion, n.
n. [Fr. atténuation, Pr. atenuacio, Lat. attenuatio.]
Sense 1. The act of attenuating, or making thin, as fluids; as, the attenuation of the humors.
Sense 2. The act of making fine by comminution or attrition; pulverization.
The action of the air facilitates the attenuation of these rocks. (Chaptal, Trans.
Sense 3. The act or process of making slender or lean.