noun🔗Share除虫菊酯，除虫菊精。 Any 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. "园丁在玫瑰花上喷洒了除虫菊酯，以杀死蚜虫。compoundsubstancechemistryagricultureinsectplantsciencebiologynatureenvironmentChat with AIVocabulary GamePractice Reading
