light-emitting diode

/L AY1 T IH0 M IH0 T IH0 NG D AY0 OW0 D/
noun
  1. 1

    A rectifying semiconductor device which converts electrical energy into electromagnetic radiation of a wavelength in or near the visible spectrum of light.

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Source: https://en.wiktionary.org/wiki/light-emitting%20diode