The quality or state of being excandescent; extreme brightness or intense heat producing light.
From excandescent + -cy (noun suffix). A variant noun form of the adjective, following Latin/English -entia and -cy patterns.
Scientists in the 1800s used this word to describe the moment when heated metals reach their brightest point—it's that fleeting moment before pure incandescence.
Complete word intelligence in one call. Free tier — 50 lookups/day.