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ether
noun
A colorless volatile highly flammable liquid formerly used as an inhalation anesthetic
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noun
A colorless volatile highly flammable liquid formerly used as an inhalation anesthetic
noun
A medium that was once supposed to fill all space and to support the propagation of electromagnetic waves
noun
Any of a class of organic compounds that have two hydrocarbon groups linked by an oxygen atom
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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