Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A toxic nonpersistent contact herbicide, C12H14 N2, usually formulated as its colorless dichloride salt, C12H14Cl2N2, or yellow bismethyl sulfate salt, C12H14N2O8S2.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun chemistry A poisonous yellow herbicide derived from bipyridine

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a poisonous yellow solid used in solution as a herbicide

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[para– + quat(ernary).]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From a trademark.

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Examples

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  • See comment on viologen.

    August 2, 2017