Definition of flashcube in English:

flashcube

noun

historical
  • A set of four flashbulbs arranged in a cube and operated in turn.

    • ‘It was a blur of revolving red lights on idling cars, and stern blue-uniformed men, and flashcubes popping everywhere.’
    • ‘‘The theft of a twelve-million dollar painting by Vermeer,’ said the officer sternly, and all three Californians blinked as a flashcube went off in their faces.’
    • ‘Thousands of flashcubes popped for these and other daring routings.’

Pronunciation:

flashcube

/ˈflaʃkjuːb/