- Pthirus
- A genus of lice (family Pediculidae) formerly grouped in the genus Pediculus. The main species is P. pubis (formerly Pediculus pubis), the crab or pubic louse, a parasite that infests the pubis and neighboring hairy parts of the body. Often incorrectly spelled Phthirus or Phthirius. [irreg. fr. G. phtheir, louse]
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Pthir·us 'thir-əs n a genus of lice of the family Pediculidae that contains the crab louse (P. pubis)* * *
Pthir·us (thirґəs) Phthirus.
Medical dictionary. 2011.