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Any component other than an active ingredient.
Inactive Ingredient (Wiktionary)
English
Etymology
From in- + active ingredient.
Noun
inactive ingredient (plural inactive ingredients)
- A component of a mixture product which does not directly contribute to the product's primary goal, but helps to make the product more stimulating to the consumer or to assist the active ingredient in some small manner.
See also
- excipient
Non-active component, excipient, filler, carrier, inert substance