光二极管 guāng'èrjíguǎn photodiode Origin Definitions Defs Strokes Stroke Words Sentences Sents 光 guāng noun light light; ray; beam of light二极管 二極管 èrjíguǎn diode Electronic component with two electrodes that allows current to flow in only one direction; includes both vacuum tubes and semiconductor devices. Also called 二极体 èrjítǐ.