from
The Collaborative International Dictionary of English v.0.48
Itch \Itch\, n.
1. (Med.) An eruption of small, isolated, acuminated
vesicles, produced by the entrance of a parasitic mite
(the {Sarcoptes scabei}), and attended with itching. It is
transmissible by contact.
[1913 Webster]
2. Any itching eruption.
[1913 Webster]
3. A sensation in the skin occasioned (or resembling that
occasioned) by the itch eruption; -- called also
{scabies}, {psora}, etc.
[1913 Webster]
4. A constant irritating desire.
[1913 Webster]
An itch of being thought a divine king. --Dryden.
[1913 Webster]
{Baker's itch}. See under {Baker}.
{Barber's itch}, sycosis.
{Bricklayer's itch}, an eczema of the hands attended with
much itching, occurring among bricklayers.
{Grocer's itch}, an itching eruption, being a variety of
eczema, produced by the sugar mite ({Tyrogluphus
sacchari}).
{Itch insect} (Zool.), a small parasitic mite ({Sarcoptes
scabei}) which burrows and breeds beneath the human skin,
thus causing the disease known as the itch. See Illust. in
Append.
{Itch mite}. (Zool.) Same as {Itch insect}, above. Also,
other similar mites affecting the lower animals, as the
horse and ox.
{Sugar baker's itch}, a variety of eczema, due to the action
of sugar upon the skin.
{Washerwoman's itch}, eczema of the hands and arms, occurring
among washerwomen.
[1913 Webster]