English
equiluminescent
From equi- + luminescent.
Formed from equi- + luminescent
Proto-Indo-European *lewk- ‘bright’
Proto-Indo-European *léwksmn̥
Proto-Italic *louksmən
Latin lumen ‘light’
English luminescent
Today it means
adj equally luminescent
Language periods are conventional ranges, not dates for this word.
Etymograph / equiluminescent