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ethylene oxide

noun, Chemistry.
a colorless, odorless, gaseous, toxic, ring compound, C 2 H 4 O, usually obtained by the oxidation of ethylene: used chiefly in the synthesis of ethylene glycol.
Origin of ethylene oxide
First recorded in 1895-1900 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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