dynamo

Everyday

1. A dynamo is a machine that turns movement into electricity, like the small one on an old bicycle that lights the lamp when the wheel turns. tree →
2. A person who is a dynamo is full of energy and gets lots done. tree →
3. Dynamo is part of the name of several football and sports clubs, such as Dynamo Kyiv. tree →

In the lessons

In science lessons it shows how electricity can be made from motion (generators, wind turbines). In everyday talk it praises a very busy, lively person. Phrases: «a bike dynamo», «a human dynamo», «a dynamo of energy».

Examples

• My grandad's bike has a dynamo that powers the front light. tree →
• When you pedal faster, the dynamo makes the lamp brighter. tree →
• A dynamo uses magnets and coils of wire to make electricity. tree →
• Our new coach is a real dynamo. tree →
• She is a dynamo in the classroom, always helping someone. tree →
• We built a tiny dynamo in science club. tree →
• Dynamo Kyiv is a famous football club in Ukraine. tree →
• A wind-up torch has a little dynamo inside. tree →

Note

Plural: dynamos (not dynamoes). A dynamo makes electricity; a motor does the opposite and uses electricity to make movement. Modern big machines are usually called generators.