English
luminally
From luminal + -ly.
Formed from luminal + -ly
Proto-Indo-European *lewk- ‘bright’
Proto-Indo-European *léwksmn̥
Proto-Italic *louksmən
Latin lūmen ‘lights’
English luminal
Today it means
adv With regard to the lumen
Language periods are conventional ranges, not dates for this word.
Etymograph / luminally