adulteration adulteration /əˌdʌltəˈreɪʃən/

noun

1. The act of adulterating (especially the illicit substitution of one substance for another)  ( adulteration )
   the act of adulterating (especially the illicit substitution of one substance for another)
   
2. Being mixed with extraneous material; the product of adulterating  ( adulteration , debasement )
   being mixed with extraneous material; the product of adulterating