n.
Pronunciation: ˌ ī -v ə r- ' mek-t ə n
Function: noun
Etymology: perhaps from d i- + New Latin a verm itilis (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