Definition of amitraz
: a pesticide C19H23N3 used as an insecticide on crops and to control ticks, lice, and mites on animals (such as dogs and cows) … a new tick collar containing the chemical amitraz is effective in preventing ticks from attaching to the animal and is usually safe to use short-term.— Shawn Messonnier, Dallas Morning News, 4 May 2005
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