1) A class of organic compounds that have an oxygen linked between two hydrocarbon groups (Lewis 1993).
2) A common name used for ether diethyl ether, a volatile, flammable solvent.
- R. J. Gettens, G.L. Stout, R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966
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- The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998