1. (

• louse ,
• sucking_louse

) wingless usually flattened bloodsucking insect parasitic on warm-blooded animals ;

2. (

• worm ,
• louse ,
• insect ,
• dirt_ball

) a person who has a nasty or unethical character undeserving of respect ;

3. (

• plant_louse ,
• louse ,

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

4. (

• bird_louse ,
• biting_louse ,
• louse ,

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