Wiktionary
n. A coin worth one half of a dollar.
Usage examples of "half-dollar".
When summoned, the doctor found that she had severe lumbar pains, and that the os was dilated to the size of a half-dollar.
Richard actually protested, but Condy was firm, and insisted upon a half-dollar tip.
That old fool had made a trade and got forty dollars, and when we found him in the doggery the loafers had matched half-dollars with him and got every cent but what he'd spent for whisky.
In a week or two now, cents, nickels, dimes, quarters, and half-dollars, and also a trifle of gold, would be trickling in thin but steady streams all through the commercial veins of the kingdom, and I looked to see this new blood freshen up its life.
I think half the reason Kennan sent you over to me is that you were ruining his accounts, getting the extra half-dollar so often.