pyrethrin(redirected from pyrethrin I)
Also found in: Dictionary, Medical.
pyrethrin(pīrē`thrĭn): see insecticideinsecticides,
chemical, biological, or other agents used to destroy insect pests; the term commonly refers to chemical agents only. Chemical Insecticides
The modern history of chemical insecticides in the United States dates from 1867, when Paris green proved
..... Click the link for more information. .