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Big Boy

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noun
an articulated steam locomotive having a four-wheeled front truck, one section of eight driving wheels, a second section of eight driving wheels, and a four-wheeled rear truck.
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Fill in the blank: I can’t figure out _____ gave me this gift.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use Big Boy in a sentence

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