|Origin:||dynamoelectric machine (1800-1900)|
dy‧na‧mo plural dynamos [countable]
a machine that changes some other form of power directly into electricity:
bicycle lights powered by a dynamo
someone who is excited about what they do and who puts a lot of energy into it:
the team's midfield dynamo
something that has a strong effect on something else, and that makes things happen:
Oil is the dynamo of the country's economy.