Akademik

half dime
noun
: a silver five-cent coin struck by the United States mint in 1792 and from 1794 to 1873

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a silver coin of the U.S., equal to five cents, issued 1794-1805 and 1829-73.
[1785-95, Amer.]

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half dime,
a former silver coin of the United States, worth five cents. It was issued from 17 until 1873.

Useful english dictionary. 2012.