+1 vote
Why do they call a dollar bill a buck?

2 Answers

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One idea is that " buck " is just a shortened form of the word "sawbuck," which is slang for a $10 bill. This is thought to be because one of the earliest $10 bills featured the Roman numeral X, which resembles a "sawbuck" ― a frame for holding wood to be chopped and sawed.
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Why Dollars Are Called 'Bucks'