IVERMECTIN

noun Etymology: perhaps from di- + New Latin avermitilis (specific epithet of Streptomyces avermitilis, bacterium from which it is derived) + English -ect- (of unknown origin) + 1-in Date: 1981 a drug mixture of two structurally similar semisynthetic lactones that is used in veterinary medicine as an anthelmintic, acaricide, and insecticide and in human medicine to treat onchocerciasis