Coruscation is a term used to describe a bright, sparkling light. It is often used to describe the effect of light reflecting off of a surface or object. The term can be broken down into three crossword solutions: FLASH (5 letters), GLITTER (7 letters), and FLICKER (7 letters). FLASH is a sudden burst of light, GLITTER is a sparkle or shine, and FLICKER is a brief, intermittent light. Together, these three words create the term Coruscation, which describes a bright, sparkling light.