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Noun1.Phthirus - true lice: crab licePhthirus - true lice: crab lice      
arthropod genus - a genus of arthropods
crab louse, Phthirius pubis, pubic louse, crab - a louse that infests the pubic region of the human body
References in periodicals archive ?
1 The three major lice that infest humans are Pediculus humanus capitis (head lice), Phthirus pubis (crab lice) and Pediculus humanus corporis (body lice).
Phthirus pubis, preparacion montada en resina y observado en microscopio optico a 10X.
A 2009 study by the East Carolina University said about 2 to 10 per cent of the human population suffer from public lice, known scientifically as Phthirus pubis.