electrode

electrode — noun

1. the place on a battery or machine where electricity connects as it moves between

1.名詞B2
釋義

the place on a battery or machine where electricity connects as it moves between the device and an outside circuit

例句

The positive electrode on the battery has a small plus sign next to it.

positive/negative electrode — naming the polarity

Salma checked that the battery electrodes were clean before reconnecting the wires.

同義詞
  • terminal

    more general term for any connection point; electrode specifically implies current entering or leaving

  • contact

    emphasizes the touching point between two conductors; less specific than electrode

文法句型

electrode + of [device]

positive/negative + electrode

用法筆記

This sense emphasizes the physical terminal location — the point where a wire attaches — not the wire itself. The positive and negative electrodes on a battery are often marked with + and − symbols.

常見錯誤

❌I touched the two electrodes together to complete the circuit.
✅I touched the two wires together to complete the circuit.
💡An electrode is the terminal point, not the wire that connects to it.

2. a piece of conducting material, such as a metal rod or wire, that touches a part

2.名詞B2
釋義

a piece of conducting material, such as a metal rod or wire, that touches a part of an electrical system so that current can pass through it

例句

Christopher placed copper electrodes into the liquid to test how electricity passes through it.

copper electrode — material used in chemistry experiments

The doctor gently pressed an electrode against the patient's chest to measure her heart rate.

medical context: electrode on skin for measurement

同義詞
  • conductor

    broader term; any material that lets electricity flow, not necessarily shaped for contact

  • probe

    often implies a pointed or specialized electrode used for testing or measurement

  • lead

    refers to the wire connecting an electrode to a device; more common in medical contexts

文法句型

[material] + electrode

electrode + for/in [application]

用法筆記

Common in medical (ECG electrodes attached to the skin), industrial (welding electrodes), and laboratory settings (electrodes in chemical cells). The material — copper, silver, carbon, or platinum — varies by application.

常見錯誤

❌The electric current flows along the electrode.
✅The electric current flows through the wire to the electrode.
💡An electrode is a point of contact, not the path the current travels along.