English

interplanar

From inter- + planar.

A compound of inter- + planar

Proto-Indo-European *h₁én ‘in’

Proto-Indo-European *h₁entér ‘between’

Proto-Italic *n̥ter ‘between’

Latin inter ‘between’

Proto-Indo-European *pl̥h₂nós

Proto-Italic *plānos

Latin plānus ‘flat”, “level’

Late Latin plānārius ‘relating to a plane’

Today it means

adj Between planes

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

Etymograph / interplanar