aether: see ether, in physics and astronomy.
Aether originally was the personification of the "upper sky", space and heaven, in Greek mythology.

The term aether, æther or ether may also refer to one of the following:


Science and engineering

  • The aether of classical elements is a concept, historically, used in science (as a medium) and in philosophy (as a substance).
    • Any number of aether theories in alchemy, natural philosophy, and 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:



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