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(organic chemistry) A broad-spectrum insecticide, belonging to the phenylpyrazole family, that disrupts the insect's central nervous system. quotations examples
He thinks new classes of insecticides introduced in the last 20 years, including neonicotinoids and fipronil, have been particularly damaging as they are used routinely and persist in the environment: “They sterilise the soil, killing all the grubs.”
2019 February 10, Damian Carrington, “Plummeting insect numbers 'threaten collapse of nature'”, in The Guardian