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paraquat

[ par-uh-kwaht ]
/ ˈpær əˌkwɑt /
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See synonyms for: paraquat / paraquats on Thesaurus.com

noun Chemistry.
a toxic herbicide, C12H14N2⋅2CH3SO4, applied to food and flower crops and to highway borders as a defoliant and weed-killer.
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Origin of paraquat

1960–65; para-1 + quat(ernary), in reference to the bond between the two pyridyl groups, which is in the para position with respect to their quaternary nitrogen atoms
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

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British Dictionary definitions for paraquat

Paraquat
/ (ˈpærəˌkwɒt) /

noun
trademark a yellow extremely poisonous soluble solid used in solution as a weedkiller
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for paraquat

paraquat
[ părə-kwŏt′ ]

A toxic compound used as a herbicide, especially in its colorless, dichloride form (C12H14Cl2N2) or in its yellow, bismethyl sulfate form (C14H20N2O8S2). Paraquat is used primarily to control grass and weeds. Its use in the United States is restricted because of its high level of toxicity.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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