electrode

IPA/ɪˈlektrəʊd/
KK[ˌɪlˈɛktrod]IPA/ɪˈlektrəʊd/

electrode — noun

  • electrodesingular
  • electrodesplural

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

1.nounB2
Definition

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

Example

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.

Common collocations
  • positive electrode
  • negative electrode
  • battery electrode
  • electrode terminal
Synonyms
  • 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

Grammar Patterns

electrode + of [device]

positive/negative + electrode

Usage Note

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.

Common Mistakes

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.nounB2
Definition

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

Example

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

Common collocations
  • copper electrode
  • carbon electrode
  • electrode pad
  • welding electrode
  • ECG electrode
Synonyms
  • 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

Grammar Patterns

[material] + electrode

electrode + for/in [application]

Usage Note

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.

Common Mistakes

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.

Word family

  • anode
    nounC1
  • cathode
    nounC1
  • electrochemistry
    nounC1
  • electrolytic
    adjectiveC1

Synonym discussion

Sense: noun/2

Electrode, conductor, probe, and lead all relate to electricity flow but differ in function. An electrode is specifically designed to make contact with a part of a circuit or a medium (skin, liquid, metal) — it both conducts and interfaces. A conductor is any material that allows current to flow; copper wire is a conductor, but only the tip that touches something is an electrode. A probe is a pointed or specialized electrode used for testing, measuring, or sensing — it emphasizes the investigative purpose. A lead is the wire connecting an electrode to a measuring device; in an ECG setup, the lead carries the signal from the electrode on the skin to the monitor. In everyday use: "The doctor placed electrodes on the patient's chest and attached leads to the ECG machine."

electrode ↗conductor ↗probe ↗lead ↗

Common collocations

Nouns

  • electrode material
  • electrode surface
  • electrode placement
  • electrode type

Phrases

  • pair of electrodes
  • set of electrodes

Prepositions

  • between electrodes
  • across electrodes

Etymology

GreekEnglish

Coined by the English scientist Michael Faraday in the 1830s. He combined the Greek word elektron (amber, associated with static electricity) with hodos (way or path), creating a word that literally means "the path electricity travels along." The term was invented alongside anode and cathode to describe the two ends of a battery or electrolytic cell.