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Definitions of ether
  1. noun
    a colorless volatile highly flammable liquid formerly used as an inhalation anesthetic
  2. noun
    a medium that was once supposed to fill all space and to support the propagation of electromagnetic waves

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  3. noun
    the fifth and highest element after air and earth and fire and water; was believed to be the substance composing all heavenly bodies

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  4. noun
    any of a class of organic compounds that have two hydrocarbon groups linked by an oxygen atom
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