dalapon

[ dal-uh-pon ]

/ ˈdæl əˌpɒn /

a selective herbicide, C3H4Cl2O2, used to eradicate certain grass weeds in sugarcane and other crops.

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1950–55; probably d(i)-al(ph)a-(dichloropro)p(i)on(ic acid), an alternate chemical name; see di-¹, alpha, chloro-², propionic