1. A small cube-shaped device containing four flashbulbs that fire in sequence when triggered, used to provide light for photography.
Usage: plural noun; often used in singular form 'flashcube'; dated; largely obsolete with the advent of electronic flash and digital photography

Examples

• The photographer inserted a flashcube into the camera before taking the portrait.
• Flashcubes were a popular accessory for instant cameras in the 1960s and 1970s.
• Each flashcube contained four individual bulbs that would light up one at a time.
• My grandmother's old camera still has a socket for flashcubes.
• Before LED flash, photographers relied on flashcubes to illuminate indoor shots.