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a genus of lice. P. pu´bis is the pubic or crab louse, a species that infests human pubic hair and sometimes other hairy areas; see also pediculosis pubis.
Pthirus(thī'rŭs), Avoid the misspellings Phthirus and Phthirius.
A genus of lice (family Pediculidae) formerly grouped in the genus Pediculus. The main species is Pthirus pubis (formerly Pediculus pubis), the crab or pubic louse, a parasite that infests the pubes and neighboring hairy parts of the body.
[irreg. fr. G. phtheir, louse]
Phthirus/Phthir·us/ (thir´us) a genus of lice, including P. pu´bis (the pubic, or crab, louse), which infests the hair of the pubic region, and sometimes the eyebrows and eyelashes.
Etymology: Gk, phtheir, louse
a genus of blood-sucking lice that includes the species P. pubis, the crab louse.