WordWeb Online

1. Wingless usually flattened bloodsucking insect parasitic on warm-blooded animals
   - sucking louse
    
2. Any of several small insects especially aphids that feed by sucking the juices from plants
   - plant louse
    
3. Wingless insect with mouth parts adapted for biting; mostly parasitic on birds
   - bird louse, biting louse

1. A person who has a nasty or unethical character undeserving of respect
   - worm [informal], insect, dirt ball

Derived forms: lice, louses

Type of: disagreeable person, homopteran, homopterous insect, insect, unpleasant person

Part of: Anoplura, Mallophaga, order Anoplura, order Mallophaga

Encyclopedia: Louse