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• wingless usually flattened bloodsucking insect parasitic on warm-blooded animals

  synonym	sucking louse
  derivation	lousy
  holo member	Anopluraorder Anoplura
  hypernym	insect
  hyponym	body lousecommon lousecootiecrabcrab lousehead lousePediculus capitisPediculus corporisPediculus humanusPhthirius pubispubic louse

• any of several small insects especially aphids that feed by sucking the juices from plants

  synonym	plant louse
  derivation	lousy
  hypernym	homopteranhomopterous insect
  hyponym	adelgidaphidgrape lousegrape phylloxerajumping plant louseoak blightPhylloxera vitifoleaepsyllapsyllid

• wingless insect with mouth parts adapted for biting; mostly parasitic on birds

  synonym	bird lousebiting louse
  derivation	lousy
  holo member	Mallophagaorder Mallophaga
  hypernym	insect
  hyponym	chicken louseMenopon gallinaeMenopon palladumshaft louse

• a person who has a nasty or unethical character undeserving of respect

  synonym	dirt ballinsectworm
  exemplifies	depreciationderogationdisparagement
  hypernym	disagreeable personunpleasant person