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# diode

«diode» in Mova's school dictionary: **a small electronic part that lets electric current flow…** — its meaning for a pupil, its sense in the lessons and examples.

### part of speech

noun (a diode, diodes)

### meaning for a pupil

1) A diode is a small electronic part that lets electric current flow in only one direction, like a one-way door. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/D/diode/#m1)

2) A light-emitting diode (LED) is a diode that gives out light when current passes through it. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/D/diode/#m2)

### sense in the lessons

Used in science and technology lessons about circuits: a diode in the wrong way round stops the circuit working. LEDs are in torches, screens, traffic lights and Christmas lights because they use little energy. Phrases: light-emitting diode (LED), a diode in a circuit, forward and reverse.

### examples

- A diode lets the current go only one way. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/D/diode/#x1)
- We put the LED in the circuit backwards, so it did not light up. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/D/diode/#x2)
- Our torch uses tiny diodes instead of an old bulb. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/D/diode/#x3)
- The circuit diagram shows a diode as a triangle with a line. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/D/diode/#x4)
- LED stands for light-emitting diode. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/D/diode/#x5)
- The robot's eyes are two red diodes. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/D/diode/#x6)
- If the diode is turned round, the buzzer stops. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/D/diode/#x7)

### note

Countable. Say «DY-ode». LED is said letter by letter (L-E-D) or sometimes «led». A diode is not a battery: it does not make electricity, it only controls which way it flows. Its long leg is usually the positive one.

### Trees and pragmatics

[Every meaning and example of «diode» parsed by Mova](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/D/diode/), each sentence with its dependency tree and frames.