nounmasculinepl: cathodes
cátodo
1. The negatively charged electrode in an electrochemical cell, battery, or vacuum tube toward which positively charged ions (cations) migrate
In a battery, electrons flow from the cathode through the external circuit to the anode.
Em uma bateria, os elétrons fluem do cátodo através do circuito externo para o ânodo.
2. The electrode from which electrons are emitted in a vacuum tube or cathode ray tube
The cathode in an old television tube emitted electrons that struck the phosphor screen.
O cátodo em um tubo de televisão antigo emitia elétrons que atingiam a tela de fósforo.
3. In electroplating, the object being coated with metal
The jewelry piece served as the cathode during the electroplating process.
A peça de joalharia serviu como cátodo durante o processo de galvanoplastia.
The term 'cathode' is primarily used in scientific, technical, and educational contexts in both Brazil and the USA. It's fundamental to understanding electronics, chemistry, and physics. The word comes from Greek 'kathodos' (way down) and is used identically across English and Portuguese-speaking scientific communities, making it a truly international technical term.
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