Definitions

1. noun

A substance or agent used to kill ticks, mites, and other arachnids, especially those that are pests of plants, animals, or human health.

“The farmer used an acaricide to control the spider mites infesting his orchard.”

2. noun

A chemical substance used to kill ticks, mites, and other small arachnids that are vectors of disease.

“Researchers tested various acaricides to find an effective treatment for Lyme disease.”