English

lightfront

From light + front.

A compound of light + front

Proto-Indo-European *lewk- ‘to shine’

…

Proto-Germanic *leuhtą

Proto-West Germanic *leuht ‘light’

Old English lēoht

Middle English light ‘light, illumination’

English light

Latin frōns ‘forehead’

Old French front ‘forehead’

Middle English front

English front

Today it means

noun The set of photons in the same phase of a pulse of (especially laser) light.

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

Etymograph / lightfront