light-emitting diode

electronics (LED) a type of diode that emits light when

current passes through it. Depending on the material used the

colour can be visible or infrared. LEDs have many uses,

visible LEDs are used as indicator lights on all sorts of

electronic devices and in moving-message panels, while

infrared LEDs are the heart of remote control devices.

See also smoke-emitting diode.

(1996-01-05)