noun🔗ShareПиретриныAny of a number of naturally occurring insecticides extracted from the pyrethrum plant; unusual in having a cyclopropane ring."The gardener sprayed pyrethrin on the roses to kill the aphids. "Садовник опрыскал розы пиретрином, чтобы убить тлю.compoundsubstancechemistryagricultureinsectplantsciencebiologynatureenvironmentChat with AIVocabulary GamePractice Reading
