Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A parasitic louse (Pediculus humanus subsp. capitis) that infests the human scalp and causes itching.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A parasitic insect, Pediculus humanus capitis, which lives among the hairs on the head of a human and feeds on blood.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun infests the head and body of humans

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