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Ether vs Spacetime - What's the difference?

ether | spacetime |

As nouns the difference between ether and spacetime

is that ether is ether while spacetime is (uncountable|physics) the four-dimensional continuum of the three spatial dimensions plus time.

ether

English

(wikipedia ether)

Alternative forms

* aether * (dated British spelling) * aethyr, ethyr (archaic spellings)

Noun

  • (organic compound, countable) A compound containing an oxygen atom bonded to two hydrocarbon groups.
  • (organic compound, uncountable) Diethyl ether (C4H10O), a compound used as an early anaesthetic.
  • (ancient philosophy, and, alchemy, uncountable) A classical physical element, considered as prevalent in the heavens and inaccessible to humans. In some versions of alchemy, this was the fifth element in addition to air, earth, fire and water.
  • (archaic, physics, uncountable) A substance (aether ) once thought to fill all space that allowed electromagnetic waves to pass through it and interact with matter, without exerting any resistance to matter or energy (disproved by Einstein in his Theory of Relativity).
  • * {{quote-magazine, date=2013-06-14, author=(Jonathan Freedland)
    • , volume=189, issue=1, page=18, magazine=(The Guardian Weekly) , title= Obama's once hip brand is now tainted , passage=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.}}
  • The sky or heavens; the upper air.

    • Quotations

    * (English Citations of "ether")

    Derived terms

    * crown ether * lariat ether * petroleum ether * pyroacetic ether * sulfur ether, sulphur ether

    Verb

    (slang) To viciously insult.
  • * {{quote-magazine, date=2014-02-26, magazine=(Deadspin)
    • , title= HS Coach Gets Ethered By Girlfriend On FB, Resigns Amid Investigation }}

    Quotations

    (English Citations of "ether")

    Anagrams

    * ----

    spacetime

    English

    (wikipedia spacetime)

    Noun

  • (uncountable, physics) The four-dimensional continuum of the three spatial dimensions plus time.
    • An event is a point in spacetime , specified by the coordinates x,y,z and t.
  • (physics) An n''-dimensional continuum consisting of dimensions of both space & time. Normally spacetime is considered as having 4 dimensions (''x'', ''y'', ''z'', ''t ), but higher-dimensional spacetimes are often encountered in theoretical physics, e.g. the 5-dimensional spacetime of Kaluza-Klein theory or the 11 dimensions of spacetime in M-theory.
  • (relativity) A specific region of the universe with mathematically different properties than the surrounding spacetime. Synonymous with "metric" within the context of general relativity.
    • "a Schwarzschild spacetime," "a Reissner-Nordström spacetime," etc. as opposed to sense (2) describing the universe's spacetime as a whole: "a Minkowski spacetime," "a 5-dimensional spacetime," etc.

    Anagrams

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