dy ‧ na ‧ mo /ˈdaɪnəməʊ $ -moʊ/ BrE AmE 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:
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.