cathode - Master This Word
Master this word with our 5-step learning method – Learn English in English
cathode Word Meanings
- the negative electrode in an electrochemical cell
- the electrode where reduction occurs
- a source of electrons in devices like vacuum tubes
cathode Example Sentences
Example sentences are the start of understanding. Don't rush to memorize. First feel how the word works in a sentence.
cathode Phonetic & Pronunciation
UK
/ˈkæθəʊd/
US
/ˈkæθoʊd/
cathode Word Etymology
Root: 'cath-' (from Greek 'kathodos' meaning 'way down') + '-ode' (meaning 'path or road'). Historical origin: Greek → Latin → English. Memory image: Imagine a downhill path leading to a glowing source of electrons; the 'way down' connects to the flow of electricity in circuits.
Note 1: These definitions and etymologies are not standard dictionary definitions, but extended explanations provided to help with memorization and understanding of the actual application of words. Through this background information, we strive to make words more vivid and easier to understand, and help you remember their meanings in real life.
Note 2: LexiTalk designs the learning flow around the linguistics principle of “Comprehensible Input.” When learners encounter material that is slightly above their level but still understandable from context, the brain naturally absorbs the language. That’s why we keep every word inside authentic contexts, using examples and associations to help you understand it and use it flexibly.
Read the FAQ explanation of Comprehensible InputReal Context
An electrode called the cathode is the part of an electrochemical setup where electrons flow toward or away, depending on the type of cell. In a galvanic (voltaic) cell, the cathode is the positive electrode, attracting cations and accepting electrons from the external circuit as the cell generates power. In an electrolytic cell, powered from an outside source, the cathode becomes the negative electrode where reduction occurs, while oxidation happens at the anode. In vacuum tubes and other devices, a heated cathode emits electrons, creating a beam that travels to the anode. The term comes from Greek kathodos, 'the way down,' reminding us that electrons move toward the anode in many devices, while conventional current is described from positive to negative.
Usage Reminders
- Cathode = site of reduction; remember the polarity flips between galvanic and electrolytic cells. Use diagrams to track electron flow. In vacuum tubes, think of the cathode as the electron source. The cathode is labeled in schematics with C, K, or NEG depending on context. Distinguish cathode from anode by the redox reaction occurring there. Practice identifying which electrode is negative or positive in different cell types. Relate the term to kathodos, the Greek root.
Common Misconceptions
- The cathode is always negative.
- Cathode and anode are the same in every cell.
- Reduction only happens at the cathode.
- The cathode is not part of the circuit during operation.
- Cathode concepts only apply to batteries, not to vacuum tubes.
Thinking Differences
English users tend to think of the cathode as the 'negative side' due to historical battery terminology, then must remember the galvanic vs electrolytic polarity flip in classrooms. Focus on the rule: cathode is the site of reduction, but which electrode that is depends on cell type.
Learning Tips
- Sketch a simple galvanic cell and label anode/cathode.
- Memorize: cathode is the site of reduction.
- Practice with diagrams showing electron flow vs conventional current.
- Use mnemonic cues from kathodos meaning 'way down'.
- Link the term to real devices: batteries and vacuum tubes.
- Quiz yourself by reversing cell types (galvanic vs electrolytic) and noting changes.
5-Step Learning Method - Learn English in English
Step 1: Meaning
What is the definition of 'cathode'?
A.A negatively charged electrode
B.A positively charged electrode
C.An electronic device
D.A type of battery
Step 2: Usage
Which of the following sentences uses 'cathode' correctly?
A.The cathode is where positive ions move.
B.In the circuit, the cathode emits electrons.
C.The cathode is filled with water.
D.She painted the cathode blue.
Step 3: Similar Words
Which word is most similar to 'cathode'?
A.Anode
B.Capacitor
C.Resistor
D.Diode
Step 4: Opposite Words
What is the opposite of 'cathode'?
A.Magnet
B.Anode
C.Switch
D.Battery
Step 5: Mastery
Can you think of a real-life context involving a device that uses a cathode?
A.A common battery facilitates the flow of photoelectric energy.
B.A standard flashlight has a rechargeable cathode inside.
C.The device converts electrical energy to light, illuminating the room.
D.A solar panel generates energy from sunlight.
Related Listening
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