English

extraluminal

From extra- + luminal.

Proto-Indo-European *h₁éǵʰs ‘out’

Proto-Indo-European *h₁eǵʰsteros

Proto-Italic *eksteros

Latin exter ‘being on the outside’

Latin extrā ‘outside, except, beyond’

Proto-Indo-European *lewk- ‘bright’

Proto-Indo-European *léwksmn̥

Proto-Italic *louksmən

Latin lūmen ‘lights’

Today it means

adj Outside the lumen.

Language periods are conventional ranges, not dates for this word.

Etymograph / extraluminal