Etymograph

English

abactinal

From ab- + actinal.

A compound of ab- + actinal

Proto-Indo-European *h₂epo ‘off, away’

English ab-

Ancient Greek ἀκτίς ‘ray’

English actinal

Today it means

adj Pertaining to the surface or end opposite to the mouth in a radiate animal.

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

Etymograph / abactinal