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Definition of Quaternary ammonium compound
1. Noun. A compound derived from ammonium with hydrogen atoms replaced by organic groups; used as surface-active agents, disinfectants, and in drugs.
Generic synonyms: Organic Compound
Definition of Quaternary ammonium compound
1. Noun. (chemistry) An amine derivative, containing four radicals, of general formula R1R2R3R4-N+X-; the radicals may be the same, different, or part of a ring; X is any univalent cation such as OH-. ¹
¹ Source: wiktionary.com