|a parasitic louse, Pthirus (or Phthirus) pubis, that infests the pubic region in man|
|—n , pl lice, louses|
|1.||any wingless bloodsucking insect of the order Anoplura: includes Pediculus capitis (head louse), Pediculus corporis (body louse), and the crab louse, all of which infest manRelated: pedicular|
|2.||biting louse, bird louse any wingless insect of the order Mallophaga, such as the chicken louse: external parasites of birds and mammals with biting mouthparts|
|3.||any of various similar but unrelated insects, such as the plant louse and book louse|
|4.||slang an unpleasant or mean person|
|5.||to remove lice from|
|[Old English lūs; related to Old High German, Old Norse lūs]|
crab louse n.
A sucking louse that generally infests the pubic region and causes severe itching.
n. pl. lice (līs)
Any of numerous small, flat-bodied, wingless biting or sucking insects of the orders Mallophaga or Anoplura, many of which are external parasites on humans.
sucking louse in the human louse family, Pediculidae (suborder Anoplura, order Phthiraptera), that is found principally at the pubic and perianal areas, occasionally on the hairs of the thighs and abdomen, and rarely on other hairy regions of the human body. It is broad and small, averaging 1.5 to 2 mm (0.01 to 0.08 inch) in length. Its first pair of legs is smaller than the other two pairs. When seen under magnification, it looks like a crab
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