definition of
louse

[1] #1 louse n. [sucking louse] wingless usually flattened bloodsucking insect parasitic on warm-blooded animals. wn

[2] #2 louse n. [worm, insect, dirt ball] a person who has a nasty or unethical character undeserving of respect. wn

[3] #3 louse n. [plant louse] any of several small insects especially aphids that feed by sucking the juices from plants. wn

[4] #4 louse n. [bird louse, biting louse] wingless insect with mouth parts adapted for biting; mostly parasitic on birds. wn