noun

• A light-emitting diode (a semiconductor diode which glows when a voltage is applied)

  ‘light sources can be fluorescent tubes, optical fibers, or LEDs’

  More example sentences

  • ‘an LED display’
  • ‘Companies are developing ways to use organic light-emitting diodes as a source for lighting up rooms.’
  • ‘Japanese scientists have proposed a solution to the puzzle of why blue light-emitting diodes are so bright.’
  • ‘Powerful light-emitting diodes have been shown to help heal wounds in laboratory animals and are now being tested on humans at the Medical College of Wisconsin.’