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 ether ether /ˈiːθɝ/

noun

  1. A colorless volatile highly flammable liquid formerly used as an inhalation anesthetic  ( diethyl ether , divinyl ether , ether , ethoxyethane , ethyl ether , vinyl ether )
    a colorless volatile highly flammable liquid formerly used as an inhalation anesthetic
  2. A medium that was once supposed to fill all space and to support the propagation of electromagnetic waves  ( aether , ether )
    a medium that was once supposed to fill all space and to support the propagation of electromagnetic waves
  3. Any of a class of organic compounds that have two hydrocarbon groups linked by an oxygen atom  ( ether )
    any of a class of organic compounds that have two hydrocarbon groups linked by an oxygen atom
  4. The fifth and highest element after air and earth and fire and water; was believed to be the substance composing all heavenly bodies  ( ether , quintessence )
    the fifth and highest element after air and earth and fire and water; was believed to be the substance composing all heavenly bodies