Snowman Prophet of Doom
Member
Dresden said:Ether.
e·ther   
[ee-ther] Show IPA
noun
1.
Also called diethyl ether, diethyl oxide, ethyl ether, ethyl oxide, sulfuric ether. Chemistry, Pharmacology . a colorless, highly volatile, flammable liquid, C 4 H 10 O, having an aromatic odor and sweet, burning taste, derived from ethyl alcohol by the action of sulfuric acid: used as a solvent and, formerly, as an inhalant anesthetic.
2.
Chemistry . (formerly) one of a class of compounds in which two organic groups are attached directly to an oxygen atom, having the general formula ROR.
3.
the upper regions of space; the clear sky; the heavens.
I'm assuming number 3?