Longman Dictionary of Contemporary English homepage

Date: 1800-1900
Origin: dynamoelectric machine (1800-1900)

dynamo

noun
     
Related topics: Electricity, Electricity, Tools
dy‧na‧mo plural dynamos [countable]
1TPE a machine that changes some other form of power directly into electricity:
bicycle lights powered by a dynamo
2 someone who is excited about what they do and who puts a lot of energy into it:
the team's midfield dynamo
3 something that has a strong effect on something else, and that makes things happen:
Oil is the dynamo of the country's economy.

Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.

Explore our topic dictionary