noun Chemistry.
a colorless, flammable, liquid cyclic ether, C 4 H 8 O 2 , having a faint, pleasant odor: used chiefly in the varnish and silk industries and as a dehydrator in histology.

1910–15; di-1 + ox(y)-2 + -ane

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World English Dictionary
dioxan or dioxane (daɪˈɒksən, daɪˈɒkseɪn)
a colourless insoluble toxic liquid made by heating ethanediol with sulphuric acid; 1,4-diethylene dioxide: used as a solvent, esp for waxes and cellulose acetate resins. Formula: (CH2)2O(CH2)2O
dioxane or dioxane

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
dioxane   (dī-ŏk'sān')  Pronunciation Key 
A flammable, potentially explosive, clear liquid that is used as a solvent for fats, greases, and resins. It is also used in various products including paints, lacquers, glues, cosmetics, and fumigants. Chemical formula: C4H8O2.
The American Heritage® Science Dictionary
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Example sentences
Dioxane is stable when dry, but becomes unstable at elevated temperatures and pressures.
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