English

interfrontal

From inter- + frontal.

Proto-Indo-European *h₁én ‘in’

Proto-Indo-European *h₁entér ‘between’

Proto-Italic *n̥ter ‘between’

Latin inter ‘between’

Latin frons ‘the forehead, brow, front’

New Latin frontālis ‘relating to the forehead’

Today it means

adj Between the frontal bones

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

Etymograph / interfrontal