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diode

noun
🔊/ˈdaɪəʊd/
🔊/ˈdaɪəʊd/
 (specialist)
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  1. an electronic device in which the electric current passes in one direction only, for example a silicon chip（电子）二极管Topics Engineeringc2
    Word Originearly 20th cent.: from di- ‘two’ + a shortened form of electrode.