Definition of "spinosad" [spinosad]

• Any of a class of insecticides whose active ingredient is derived from a naturally-occurring soil-dwelling bacterium, Saccharopolyspora spinosa. (noun)

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• "Lice ingest Natroba's main insecticide, spinosad, and begin to shake, until they exhaust themselves - to death."
• "Its active ingredient, spinosad, is so safe that it's approved for use on organic crops."
• "Comfortis spinosad is an FDA-approved chewable, beef-flavored tablet that kills fleas and prevents flea infestations on dogs."