aver·​mec·​tin ˌā-vər-ˈmek-tən How to pronounce avermectin (audio)
: any of several macrocyclic lactones that are produced by the fermentation of a soil bacterium (Streptomyces avermitilis) and have anthelmintic and insecticidal properties see ivermectin

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“Avermectin.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/avermectin. Accessed 24 Sep. 2023.

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