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Etymology

From Middle English louslowslowse, from Old English lūs, from Proto-Germanic *lūs (compare West Frisian lûsDutch luisGerman Low German LuusGerman Laus), from Proto-Indo-European *lewH- (compare Welsh llau (lice)Tocharian B luwo, maybe Sanskrit यूका (yūkā)).

Pronunciation

  • (UK) IPA(key)/laʊs/
  • Rhymes: -aʊs

Noun

louse (plural lice or louses)

  1. A small parasitic wingless insect of the order Psocodea.
  2. (colloquial, dated, not usually used in plural form) A contemptible person; one who is deceitful or causes harm.

Usage notes

  • When used as a term of abuse, the plural is typically louses, though lice is also possible.

Synonyms

  • (insect): (North America) cootie
  • (contemptible person): maggotworm

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