Ether
Part of speech: noun
Definition: A compound containing an oxygen atom bonded to two hydrocarbon groups. Diethyl ether (C4H10O), a compound used as an early anaesthetic. A classical physical element, considered as prevalent in the heavens and inaccessible to humans. In some versions of alchemy, this was the fifth element in addition to air, earth, fire and water. A substance (aether) once thought to fill all space that allowed Electromagnetic waves to pass through it and interact with matter, without exerting any resistance to matter or energy (disproved by Einstein in his Theory of Relativity). The sky or heavens; the upper air.
Example sentence: Music draws from almost the identical place as art does, which really is that intangible - it's like you're pulling from the ether. I don't know where it comes from.
Aether
Part of speech: noun
Definition: The substance formerly supposed to fill the upper regions of the atmosphere above the clouds, in particular as a medium breathed by deities.