Acting against or designed to prevent the growth of weeds; a substance or method used to control unwanted plants.
From 'anti-' (against) plus 'weed' (from Old English 'weod'). The term developed with modern agriculture and horticulture.
The invention of antiweed chemicals revolutionized farming in the 20th century, but it also created unforeseen consequences—some weeds evolved resistance, and environmental damage led to renewed interest in antiweed methods that don't use chemicals.
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