Definition of powder flask in English:

powder flask

noun

historical
  • A small container with a nozzle for carrying and dispersing gunpowder.

    • ‘On another occasion it was stated that a man who had been brought up from the Port with his hand shattered by the explosion of a powder flask was not visited by the surgeon till the fourth day after he had been in the infirmary.’
    • ‘He buried his powder flask to the west of the pass.’