“cathode”的概念、定义、翻译、参考文献-科学参考

单词	cathode
释义	cathode [`kath´ōd] ^ELECTRICITY The terminal at which current leaves a primary cell or storage battery; it is negative with respect to the device, and positive with respect to the external circuit. ^ELECTRONICS 1. The primary source of electrons in an electron tube; in directly heated tubes the filament is the cathode, and in indirectly heated tubes a coated metal cathode surrounds a heater. Designated K. Also known as negative electrode. 2. The terminal of a semiconductor diode that is negative with respect to the other terminal when the diode is biased in the forward direction. ^{PHYSICAL CHEMISTRY} The electrode at which reduction takes place in an electrochemical cell, that is, a cell through which electrons are being forced.
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