= W =
wall wart n.
A small power-supply brick with integral
male plug, designed to plug directly into a wall outlet; called a
`wart' because when installed on a power strip it tends to block up
at least one more socket than it uses. These are frequently
associated with modems and other small electronic devices which
would become unacceptably bulky or hot if they had power supplies
on board (there are other reasons as well having to do with the
cost of UL certification).
--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.