Adulterant

adj. making inferior, corrupting, making impure

n. substance that corrupts, substance that makes impure

Adulterants are chemical substances which should not be contained within other substances (eg. food, beverages, fuels or pesticides) for legal or other reasons. Adulterants may be intentionally added to substances to reduce manufacturing costs, or for some deceptive or malicious purpose. Adulterants may also be accidentally or unknowingly introduced into substances. The addition of adulterants is called adulteration.
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Noun
1. any substance that adulterates (lessens the purity or effectiveness of a substance); "it is necessary to remove the adulterants before use"
(synonym) adulterator
(hypernym) substance, matter
(derivation) adulterate, stretch, dilute, debase
Adjective
1. making impure or corrupt by adding extraneous materials; "the adulterating effect of extraneous materials"
(synonym) adulterating
(similar) extraneous, foreign

(n.)
That which is used to adulterate anything.
  

(a.)
Adulterating; as, adulterant agents and processes.
  

adulterant /ə'dʌltərənt/
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