English

exoplanar

From exo- + planar.

A compound of exo- + planar

Proto-Indo-European *h₁eǵʰs ‘out of’

Proto-Hellenic *eks

Ancient Greek ἐκ ‘Out of, from’

Ancient Greek ἔξω ‘outer’

English exo-

Proto-Indo-European *pl̥h₂nós

Proto-Italic *plānos

Latin plānus ‘flat”, “level’

Late Latin plānārius ‘relating to a plane’

Today it means

adj Describing an atom or group that is outside the major plane of a molecule (especially of a cyclic molecule)

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

Etymograph / exoplanar