Definition of "weedkiller" []

• A chemical agent that destroys unwanted plants (weeds) but not wanted ones (crops etc) (noun)

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• "Enjoy, but watch my dad ... he's lethal with the hoe & weedkiller!"
• "DuPont initially touted Optimum GAT to farmers as an alternative to them buying seeds equipped with Monsanto's gene for surviving glyphosate, the active ingredient in Monsanto's Roundup weedkiller."
• "DuPont's Optimum GAT seeds are genetically modified to grow into soybean plants able to survive exposure to glyphosate-based weedkiller as well as another herbicide called acetolate synthase."