Word: ether Part of Speech: noun Etymology: Etymology tree Proto-Indo-European *h₂eydʰ-der. Proto-Hellenic *áitʰō Ancient Greek αἴθω (aíthō) ▲ Ancient Greek ᾱ̓ήρ (āḗr)influ.? Ancient Greek αἰθήρ (aithḗr)der. Latin aethērder. English ether From Middle English ēther (“the caelum aetherum of ancient cosmology in which the planets orbit; a shining, fluid substance described as a form of air or fire; air”), borrowed from Anglo-Norman ether and Middle French ether, ethere, aether, from Old French aether (“highest and purest part of the atmosphere; medium supposedly filling the upper regions of space”) (modern French éther), or directly from its etymon Latin aethēr (“highest and purest part of the atmosphere; air; heavens, sky; light of day; ethereal matter surrounding a deity”) (note also New Latin aethēr (“chemical compound analogous to diethyl ether”)), from Ancient Greek αἰθήρ (aithḗr, “purer upper air of the atmosphere; heaven, sky; theoretical medium supposed to fill unoccupied space and transmit heat and light”), from αἴθω (aíthō, “to burn, ignite; to blaze, shine”), from Proto-Indo-European *h₂eydʰ- (“to burn; fire”). The English word is cognate with Italian ether, ethera (both obsolete), etere, Middle Dutch ether (modern Dutch aether (obsolete), ether), German Äther, Ether, Portuguese éter, Spanish éter. Pronunciation: /ˈiː.θə/, /ˈi.θɚ/ 1. The substance formerly supposed to fill the upper regions of the atmosphere above the clouds, in particular as a medium breathed by deities. Labels: broadly, countable, literary, poetic, uncountable Example: On Wings the Birds through Æther glide, / And Fiſhes cut with Fins the Tide. Example: Of the mysterious world, that come to me From the elements of Fire and Earth and Water, And the all-nourishing Ether! 2. The substance formerly supposed to fill the upper regions of the atmosphere above the clouds, in particular as a medium breathed by deities. Labels: broadly, countable, literary, poetic, uncountable Example: Take a snapshot of the conflicts around the world: Sunnis vs. Shiites, Israelis vs. Palestinians, Serbs vs. Kosovars, Indians vs. Pakistanis. They seem to be driven by religious hatred. It’s enough to make you wonder if the animosity would melt away if all religions were suddenly, somehow, to vanish into the ether. But James Carse doesn’t see them as religious conflicts at all. To him, they are battles over rival belief systems, which may or may not have religious overtones. Example: In barely the blink of an eye, the perfectly healthy Judy entered a permanent vegetative state. […] What haunted me was the idea that one moment you’re gazing at your 2-year-old in her playroom and the next, you, the mother, have been whisked off into the ether forever. 3. Often as aether and more fully as luminiferous aether: The hypothetical substance permeating space, functioning as a medium for electromagnetic waves to propagate through, and which does not exert resistance to the movement of matter; its existence is incompatible with Einstein's theory of relativity; famously found to be undetectable by the 1887 Michelson–Morley experiment. Labels: historical, uncountable Example: I ſuppose this æther pervades all groſs bodies, but yet ſo as to ſtand rarer in their pores than in free ſpaces, and ſo much the rarer, as their pores are leſs. And this I ſuppose (with others) to be the cauſe, why light incident on thoſe bodies is refracted towards the perpendicular; […] I ſuppose the rarer æther within bodies, and then denſer without them, not to be terminated in a mathematical ſuperficies, but to grow gradually into one another; […] Example: Having ſhewn how the Æther cauſes a great part of the Phænomena of Nature, it may be aſked, whence this general material Cauſe has its great Activity and Power? […] This Cauſe muſt be either Matter or Spirit, there being nothing in the Univerſe, which we know if, beſides theſe two. But this Cauſe cannot be Matter: for Matter is in own Nature inert, and has not any Activity in itſelf; and conſequently cannot communicate any Power to the Æther. And therefore the Cauſe, which gives the Æther its Activity and Power, muſt be Spirit. Spirit, which intercedes the Particles of Æther, and gives them a repulſive Power, and ordains and executes the Laws, by which Æther and Bodies act mutually on one another, muſt be preſent in all Parts of Space, where there is Æther. 4. The atmosphere or space as a medium for broadcasting radio and television signals; also, a notional space through which Internet and other digital communications take place; cyberspace. Labels: colloquial, uncountable Example: H. P. Lovecraft, At the Mountains of Madness He held some friendly chat with Pabodie over the ether, and repeated his praise of the really marvelous drills that had helped him make his discovery. Example: Now we are liberal with our innermost secrets, spraying them into the public ether with a generosity our forebears could not have imagined. Where we once sent love letters in a sealed envelope, or stuck photographs of our children in a family album, now such private material is despatched to servers and clouds operated by people we don't know and will never meet. 5. A particular quality created by or surrounding an object, person, or place; an atmosphere, an aura. Labels: colloquial, uncountable Example: The luminous æther of his life was not obſcured by any ſhade dark enough to be denominated a defect. 6. Diethyl ether (C₄H₁₀O), an organic compound with a sweet odour used in the past as an anaesthetic. Labels: uncountable Example: But the moſt valuable Qualities of the ÆTHER are it's medicinal ones; it having been found by repeated Experience to be an excellent Remedy in moſt nervous Diſeaſes; particularly in Fits of all ſorts, whether Epileptic, Convulſive, Hyſteric, Hypochondriac, or Paralytic: […] Example: To A Gould and William T. G. Morton, of Boston, Mass., for improvement in apparatus for inhaling ether; &c., (said Gould having assigned to said Morton.) Patented Nov. 13, 1847. 7. Any of a class of organic compounds containing an oxygen atom bonded to two hydrocarbon groups. Labels: countable Example: M. Malaguti finds that dry chlorine, while acting in the dark upon oxacid æthers, always attacks, and in a uniform manner, the sulphuric æther which is the base of them. […] The action of potash on the compound chloridized æthers is also constant and uniform: the results are always chloride of potassium, acetate of potash, and an organic salt with a base of potash, the acid of which is that which existed in the compound chloridized æther. Example: When chlorine gas is passed in excess through salicylic ether (salicylae of ethyl) heated over a water-bath, a solid substance is formed which is soluble in hot alcohol, and crystallizes, on cooling, in beautiful colourless tables. This compound is bichloruretted salicylic ether, formed from salicylic ether (C₁₈H₁₀O₆) by the substitution of 2 eq. chlorine for 2 eq. hydrogen: its composition is therefore C₁₈H₈Cl₂O₆. 8. Starting fluid. Labels: uncountable