Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Greek Mythology The poetic personification of the clear upper air breathed by the Olympians.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • proper n. One of the Greek primordial deities, the first-born elementals.

Etymologies

Latin Aethēr, from Greek aithēr, upper air.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek Αἰθήρ (Aithēr). (Wiktionary)

Examples

  • From these extracts, taken from _Modern Views of Matter_, the author claims that the theory of the Aether presented to the reader in _Aether and Gravitation_ receives added confirmation and support.

    Aether and Gravitation

  • So that from these three phases of the universal Aether, that is, from its thermal or heat manifestation, its luminiferous or light manifestation, and its electro-magnetic manifestation, we get irrefutable evidence of the existence of a centrifugal motion, which motion is ever directed away from the central body; and the result of that motion takes the form of a pressure upon any body with which the motion comes into contact.

    Aether and Gravitation

  • "Clustering of Gravitational Matter in any part of the Universe," has already suggested the possibility of the condensation of the Aether, but with the old idea of a frictionless Aether, that is, an Aether which does not possess mass, such a hypothesis is improbable.

    Aether and Gravitation

  • Tyndall's conception of the Aether, in so far as it concerns the propagation of heat waves; and, as will be shown later on, heat and light waves are due to the same physical agent -- that is, the Aether; therefore, wherever we get heat and light, there, according to Professor

    Aether and Gravitation

  • In each and every case, the pressure and tensions, which are inseparably connected, are transmitted by the atoms of the electro-magnetic Aether, that is, by the positive and negative atoms of electricity of which, according to

    Aether and Gravitation

  • Thus the conclusion that we are compelled to come to in regard to the ultimate nature of matter, in its primordial condition, is, that all matter which exists in its varied forms throughout the entire Universe finds its physical origin and source in the universal electro-magnetic Aether, which is itself atomic, and possesses all the essential properties of matter.

    Aether and Gravitation

  • Therefore, according to the law of inverse squares from the standpoint of heat, we find in the solar system a repulsive motion, due to the wave motion of the Aether, which is always exerted away from the sun in the same path that the centripetal force takes, and which like that force diminishes in intensity inversely as the square of the distance.

    Aether and Gravitation

  • The fact which we learn from these considerations is that the quantity of Aether, which is attracted by any body, is always proportionate to the mass of the body attracting it.

    Aether and Gravitation

  • To be consistent, therefore, we must either cease to call Aether matter, or else admit that Aether, like all other matter, is gravitative.

    Aether and Gravitation

  • Therefore the objector to this assumption is himself unphilosophical, in that he postulates or supposes that the Aether is a medium, with qualities which lie altogether outside the range of our experience and observation.

    Aether and Gravitation

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