Definition of "nonionic" [nonionic]

• Not ionic; anionic (adjective)

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• "Estuarine and coastal zone marine pollution by the nonionic alkylphenol ethoxylates endocrine disrupters: Is there a potential ecotoxicological problem?"
• "They are more powerful and less expensive than cationic or nonionic detergents."
• "There are four types of detergents: anionic, nonionic, cationic, and amphoteric."