Science and Engineering
- Aether (classical element), a concept, historically, used in science (as a medium) and in philosophy (as a substance)
- Aether theories in alchemy, natural philosophy, and very early modern physics which suppose a "fifth element"
- Luminiferous aether, in early physics considered to be the medium through which light propagates
- Ether, a class of chemical compounds, or specifically:
- Diethyl ether, which has the common name "ether"
Read more about this topic: Aether
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