Hypertext Webster Gateway: "louse"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Louse \Louse\ (lous), n.; pl. {Lice} (l[imac]s). [OE. lous, AS.
l[=u]s, pl. l[=y]s; akin to D. luis, G. laus, OHG. l[=u]s,
Icel. l[=u]s, Sw. lus, Dan. luus; perh. so named because it
is destructive, and akin to E. lose, loose.] (Zo["o]l.)
1. Any one of numerous species of small, wingless, suctorial,
parasitic insects belonging to a tribe ({Pediculina}), now
usually regarded as degraded Hemiptera. To this group
belong of the lice of man and other mammals; as, the head
louse of man ({Pediculus capitis}), the body louse ({P.
vestimenti}), and the crab louse ({Phthirius pubis}), and
many others. See {Crab louse}, {Dog louse}, {Cattle
louse}, etc., under {Crab}, {Dog}, etc.
2. Any one of numerous small mandibulate insects, mostly
parasitic on birds, and feeding on the feathers. They are
known as Mallophaga, or bird lice, though some occur on
the hair of mammals. They are usually regarded as degraded
Pseudoneuroptera. See {Mallophaga}.
3. Any one of the numerous species of aphids, or plant lice.
See {Aphid}.
4. Any small crustacean parasitic on fishes. See
{Branchiura}, and {Ichthvophthira}.
Note: The term is also applied to various other parasites;
as, the whale louse, beelouse, horse louse.
{Louse fly} (Zo["o]l.), a parasitic dipterous insect of the
group Pupipara. Some of them are wingless, as the bee
louse.
{Louse mite} (Zo["o]l.), any one of numerous species of mites
which infest mammals and birds, clinging to the hair and
feathers like lice. They belong to {Myobia},
{Dermaleichus}, {Mycoptes}, and several other genera.
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Louse \Louse\, v. t.
To clean from lice. ``You sat and loused him.'' --Swift.
From WordNet (r) 1.7 (wn)
louse
n 1: wingless usually flattened blood-sucking insect parasitic on
warm-blooded animals [syn: {sucking louse}]
2: has a nasty or unethical character undeserving of respect
[syn: {worm}, {insect}, {dirt ball}]
3: any of several small insects especially aphids that feed by
sucking the juices from plants [syn: {plant louse}]
4: wingless insect with mouth parts adapted for biting; mostly
parasitic on birds [syn: {bird louse}, {biting louse}]
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