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ethylene oxide

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noun Chemistry.
  1. a colorless, odorless, gaseous, toxic, ring compound, C2H4O, usually obtained by the oxidation of ethylene: used chiefly in the synthesis of ethylene glycol.
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Origin of ethylene oxide

First recorded in 1895–1900
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018