noun para·quat \ˈpa-rə-ˌkwät\

Definition of PARAQUAT

:  a highly toxic contact herbicide containing a salt of a cation [C12H14N2]2+

Origin of PARAQUAT

para- + quaternary
First Known Use: circa 1961
Medical Dictionary


noun para·quat \ˈpar-ə-ˌkwät\

Medical Definition of PARAQUAT

:  an herbicide containing a salt of a cation [C12H14N2]2+ that is used especially as a weed killer and that is extremely toxic to the liver, kidneys, and lungs if ingested


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