amitraz
noun
am·i·traz ˈa-mə-ˌtraz 
: 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
Shawn Messonnier, Dallas Morning News, 4 May 2005
Word History
Etymology
probably by rearrangement of letters from the systematic name 1,5-di-(2,4-dimethylphenyl)-3-methyl-1,3,5-triazapenta-l, 4-diene
First Known Use
1975, in the meaning defined above