1. blue pimpernel an American mint that yields a resinous exudate used especially formerly as an antispasmodic
  2. bog pimpernel small creeping European herb having delicate pink flowers
  3. yellow pimpernel trailing European evergreen with yellow flowers
  4. false pimpernel weedy plant having short dry chafflike leaves
  5. red pimpernel herb with scarlet or white or purple blossoms that close at approach of rainy weather
  6. pimpernel European garden herb with purple-tinged flowers and leaves that are sometimes used for salads
  7. blue pickerel variety inhabiting the Great Lakes
  8. water pimpernel a white-flowered aquatic plant of the genus Samolus
  9. imperative requiring attention or action
  10. blue pikeperch variety inhabiting the Great Lakes
  11. scarlet pimpernel herb with scarlet or white or purple blossoms that close at approach of rainy weather
  12. bastard pimpernel weedy plant having short dry chafflike leaves
  13. imperialism a policy of extending your rule over foreign countries
  14. pernicious exceedingly harmful
  15. temperance the trait of avoiding excesses
  16. blue-blindness rare form of dichromacy characterized by a lowered sensitivity to blue light resulting in an inability to distinguish blue and yellow
  17. Eacles imperialis large American moth having yellow wings with purplish or brownish markings; larvae feed on e.g. maple and pine trees
  18. palm kernel seed of any oil palm
  19. improperness an improper demeanor
  20. blue-pencil cut or eliminate