English

interlight

From inter- + light.

Proto-Indo-European *h₁én ‘in’

Proto-Indo-European *h₁entér ‘between’

Proto-Italic *n̥ter ‘between’

Latin inter ‘between’

Proto-Indo-European *lewk- ‘to shine’

…

Proto-Germanic *leuhtą

Proto-West Germanic *leuht ‘light’

Old English lēoht

Middle English light ‘light, illumination’

English light

Today it means

noun A lamp placed within the plant canopy to encourage growth in leaves that would otherwise be shaded.

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

Etymograph / interlight