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

noun. A poisonous yellow herbicide derived from bipyridine

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

"The following points further reinforce by believe that Sujatha was murdered rather then mishap: a. How commercially available weed killer "paraquat" enter cough syrup bottle and finally reach Sujatha's apartment?"

herbicide  weed killer  weedkiller