dynamo (n.)youdaoicibaDictYouDict[dynamo 词源字典]
1882, short for dynamo-machine, from German dynamoelektrischemaschine "dynamo-electric machine," coined 1867 by its inventor, German electrical engineer Werner Siemans (1816-1892), from Greek dynamis "power."[dynamo etymology, dynamo origin, 英语词源]