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Borrowed from English louse, German Laus. Decision no. 1283, Progreso VII.
lauso (plural lausi)
- (zoology) louse
- lausozo (“lousy person, a person that has lice”)
- Progreso IV (in Ido), 1911–1912, page 662
- Progreso VII (in Ido), 1914, page 72