active ingredient

Fetched 2026-10-26 (cache).

Synonyms: active ingredients, inactive ingredient

Antonyms: active ingredients, inactive ingredient

Related words from Datamuse; suggestions, not definitions.

Noun

1. {{lb|en|especially|pharmacology}} The [[specific]] [[compound]] in a [[natural]] or [[man-made]] [[mixture]] that is [[responsible]] for the mixture's [[activity]].
2. {{lb|en|figurative}} The [[essence]] of something, or a [[sine qua non]] that it requires.

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.