- noun a small wingless insect that sucks blood and lives on the skin as a parasite on animals and humans. There are several types, the commonest being body louse, crab louse and head louse. Some diseases can be transmitted by lice.
- noun a small insect of the Pediculus genus, which sucks blood and lives on the skin as a parasite on animals and humans
- noun a tiny parasitic insect, which lives on a person’s body and in their clothes, breeding in great numbers. It is easily transmitted to other people, thereby causing great discomfort and often transmitting disease.