Definition of pediculicide in US English:



  • A chemical used to kill lice.

    • ‘Now there's a new approach to head lice: it's non-toxic, dry-on pediculicides that suffocate and kill the little critters.’
    • ‘Growing resistance to many of the pediculicides commonly used to treat head lice may contribute to the recently noted increase in cases of infestation.’
    • ‘Treatment for all of the above involves a pediculicide.’
    • ‘Head lice are thought to be the most common type and are developing resistance to commonly used pediculicides.’
    • ‘The treatment of head lice is now complicated by the emergence of resistance to pediculicides.’


Early 20th century: from Latin pediculus ‘louse’ + -cide.