二极管 Traditional form: 二極管 Pinyin (reading): èrjíguǎn Definitions: diode Characters: 二 - two; twice 极 - extreme, top; final, furthest, utmost; pole 管 - tube, pipe, duct; to manage, to control Traditional characters: 二 - two; twice 極 - extreme, top; final, furthest, utmost; pole 管 - tube, pipe, duct; to manage, to control