dynamo
Longman Dictionary of Contemporary English 5++LDOCE 5++dy·na·mo /ˈdaɪnəməʊ $ -moʊ/ noun (plural dynamos) [countable] 1 TPEa machine that changes some other form of power directly into electricity 〔直流〕发电机 bicycle lights powered by a dynamo 以直流发电机供电的自行车车灯2 ENERGETICsomeone who is excited about what they do and who puts a lot of energy into it 充满干劲的人 the team’s midfield dynamo 球队的中场主力3 something that has a strong effect on something else, and that makes things happen 举足轻重的事物，原动力 Oil is the dynamo of the country’s economy. 石油是该国经济的原动力。
Examples from the Corpus
dynamo• That physical phenomenon is the muscle behind a dynamo, or standard electric generator.• Bicycle lights are usually powered by a dynamo.• As the Countess of Dartmouth, she was a dynamo in London politics in the 1960s.• Here was a brand-new kind of eartha rolling, boiling dynamo.• And that gives dynamo theorists a way to solve one aspect of how the molten iron mixes.• Jasso is the 5 foot 2 inch dynamo who is in charge of the teaching program.• They have generators under the floors ... like dynamos on bicycles ... that make electricity from the wheels going round.• Oil production is the dynamo that drives Iraq's economy.• The seller offered to meet half the cost of repairing the dynamo.Origin dynamo (1800-1900) dynamoelectric machine ((1800-1900))dy·na·mo nounChineseSyllable
machine other into some of form that power directly a changes Corpus
dynamo
dy‧na‧mo /ˈdaɪnəməʊ $ -moʊ/
noun (plural dynamos) [countable]
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.
dy‧na‧mo /ˈdaɪnəməʊ $ -moʊ/
noun (plural dynamos) [countable] Date: 1800-1900
Origin: dynamoelectric machine (1800-1900)
1. a machine that changes some other form of power directly into electricity:Origin: dynamoelectric machine (1800-1900)
2. someone who is excited about what they do and who puts a lot of energy into it:
3. something that has a strong effect on something else, and that makes things happen: