powder chest

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.

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