louse

Noun
  1. Wingless usually flattened bloodsucking insect parasitic on warm-blooded animals (synset 102186509)
  2. A person who has a nasty or unethical character undeserving of respect (synset 110811668)
  3. Any of several small insects especially aphids that feed by sucking the juices from plants (synset 102254427)
  4. Wingless insect with mouth parts adapted for biting;
    Mostly parasitic on birds (synset 102188133)

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