noun di·quat \ˈdī-ˌkwät\

Definition of diquat

  1. :  a powerful herbicide and plant desiccant C12H12Br2N2 used especially to control aquatic weeds and to desiccate aerial plant parts (as of potatoes) before harvesting

Origin and Etymology of diquat

di- + quaternary

First Known Use: 1960

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