diode : Idioms & Phrases
light-emitting diode
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noun diode such that light emitted at a p-n junction is proportional to the bias current; color depends on the material used
LED.
WordNet
organic light-emitting diode
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noun a self-luminous diode (it glows when an electrical field is applied to the electrodes) that does not require backlighting or diffusers
OLED.
WordNet
semiconductor diode
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noun a semiconductor that consists of a p-n junction
diode; junction rectifier; crystal rectifier.