noun
dynamo
DYE-nuh-moh/ˈdaɪnəməʊ/
A machine generating electricity from mechanical movement.
The dynamo converts its shaft's movement into electricity that powers the bulb.
Etymology
The “power” root names a machine that converts mechanical rotation into electricity. Calling an energetic person a dynamo applies that image of power generation to human activity.
In context
Molten iron in the core swirls around and generates the magnetic field. Our planet is actually a dynamo, a device that transfers mechanical energy to magnetic energy.
More examples
- Turning the crank drives a dynamo that produces electricity.
- The dynamo stops producing current when its shaft stops spinning.
- The museum displays two dynamos from an early power station.
Forms
dynamo · dynamos
Similar words
- generator
- The more common modern term for an electricity-producing machine.
- alternator
- Specifically produces alternating current; dynamos traditionally produce direct current.