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Definitions for Louse

[1] any small, wingless insect of the order Anoplura (sucking louse) , parasitic on humans and other mammals and having mouthparts adapted for sucking, as Pediculus humanus (body louse or head louse) and Phthirius pubis (crab louse or pubic louse) .
[2] any insect of the order Mallophaga (bird louse, biting louse, or chewing louse) , parasitic on birds and mammals, having mouthparts adapted for biting.
[3] plant louse.
[4] Slang . a contemptible person, especially an unethical one.
[5] to delouse.
[6] louse up , Slang . to spoil; botch: Miscasting loused up the movie.
[7] any wingless bloodsucking insect of the order Anoplura: includes Pediculus capitis (head louse ), Pediculus corporis (body louse ), and the crab louse, all of which infest man Related adjective: pedicular
[8] biting louse or bird louse any wingless insect of the order Mallophaga, such as the chicken louse: external parasites of birds and mammals with biting mouthparts
[9] any of various similar but unrelated insects, such as the plant louse and book louse
[10] plural louses slang an unpleasant or mean person
[11] to remove lice from
[12] (foll by up) slang to ruin or spoil

Words related to Louse

rat, scoundrel, knave, cad, cootie

Words nearby Louse

lourdes, lourenço marques, lourie, louring, loury, louse, louse up, louser, lousewort, lousy, lousy with

Origin of Louse

before 900; 1910–15 for def 4 ; Middle English lous(e ), luse, plural lise, lice; Old English lūs, plural lȳs; cognate with Dutch luis, German Laus, Old Norse lūs

Word origin for Louse

Old English lūs; related to Old High German, Old Norse lūs

Synonyms for Louse

cad, cootie, knave, rat, scoundrel