Definition, Meaning & Synonyms
cathode
Noun
/ˈkæθoʊd/
Definition
The electrode through which electric current flows out of a polarized electric device or system, usually a battery or an electrolytic cell.
Examples
- The cathode in a vacuum tube emits electrons when heated.
- In a simple battery, the cathode is marked as the positive terminal.
- Electrolysis uses a cathode to drive the process of decomposition in solutions.
Meaning
In electrochemistry, the cathode is the terminal where reduction occurs, which means it gains electrons during a chemical reaction.
Synonyms
- Negative electrode
- Receiving electrode
- Electrolytic electrode
