attenuation

/AH0 T EH1 N Y AH0 W EY1 SH AH0 N/
noun
  1. 1

    A gradual diminishing of strength.

  2. 2

    A reduction in the level of some property with distance, especially the amplitude of a wave or the strength of a signal.

  3. 3

    A weakening in the virulence of a pathogen or other microorganism.

  4. 4

    The tapering of a leaf etc to a fine point.

  5. 5

    A fabrication process in which a material is stretched out into a thin shape.

  6. 6

    The reduction of the active principles of medicines to minute doses.

  7. 7

    The proportion of sugar that is converted to ethanol by a yeast.

Source: https://en.wiktionary.org/wiki/attenuation