See also: aether
From Ancient Greek Αἰθήρ (Aithēr, “Bright Upper Air”).
- (Greek mythology) One of the Greek primordial deities, the first-born elementals; he was the personification of the bright, glowing upper air of heaven - the substance of light: Above him lay the solid dome of the sky-god, Uranus/Ouranos, and below, the transparent mists of earth-bound air. His sister-wife was Hemera. His Roman counterpart was Ether.