powder chest

American  

noun

1. a small wooden box containing a charge of powder, old nails, scrap iron, etc., formerly secured over the side of a ship and exploded on the attempt of an enemy to board.

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Example Sentences

There unharnessing the animals, we began at once to load the sledge, not only with the butter cask, but with a powder chest, a barrel of cheese, and a variety of other articles—ball, shot, tools, and Turk's armor, which had been left behind on our last visit.

From Project Gutenberg