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power shovel

noun
1.
any self-propelled shovel for excavating earth, ore, or coal with a dipper that is powered by a diesel engine or electric motor.
Compare shovel (def 2).
Origin
1905-1910
1905-10
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Encyclopedia Article for power-shovel

power shovel

digging and loading machine consisting of a revolving deck with a power plant, driving and controlling mechanisms, sometimes a counterweight, and a front attachment, such as a boom or crane, supporting a handle with a digger at the end. The whole mechanism is mounted on a base platform with tracks or wheels. Power shovels are used principally for excavation and removal of debris.

Learn more about power shovel with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Word Value for power

10
11
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