noun 다운로드 🔗공유 피레트린 Any of a number of naturally occurring insecticides extracted from the pyrethrum plant; unusual in having a cyclopropane ring. Examples : "The gardener sprayed pyrethrin on the roses to kill the aphids. " 정원사는 진딧물을 죽이기 위해 장미에 피레트린을 뿌렸다. compound substance chemistry agriculture insect plant science biology nature environment AI와 채팅어휘 게임독해 연습