WordNet (r) 3.0 (2006):

light-emitting diode
    n 1: diode such that light emitted at a p-n junction is
         proportional to the bias current; color depends on the
         material used [syn: light-emitting diode, LED]

The Free On-line Dictionary of Computing (30 December 2018):

light-emitting diode

    (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)