diquatPronunciation: /ˈdʌɪkwɒt/Definition of diquat noun [mass noun] a synthetic compound used in controlling plant growth, often as a non-persistent contact herbicide. A bromide of a quaternary amine; chemical formula: (C5H4NCH2)2Br2 Origin: 1960s: from di-1 'two' + quaternarydiquat in other Oxford dictionaries Definition of diquat in the US English dictionary
