- A synthetic insecticide of the pyrethroid class, used chiefly against disease-carrying insects.More example sentences
- Pyrethrins and permethrin have a similar mode of activity.
- Common treatments for head lice include permethrin and lindane.
- Spray your clothing with permethrin insecticide spray.
1970s: from per- ( sense 2) + (res)methrin, denoting a synthetic pyrethroid.
More definitions of permethrinDefinition of permethrin in:
- The British & World English dictionary