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TAKE THE QUIZ“ethionic”
The following 2 entries include the term ethionic.
ethionic acid
noun: an unstable diacid HO3SCH2CH2OSO3H known only in solution and obtainable by adding water to ethionic anhydride
ethionic anhydride
noun: a crystalline cyclic compound C2H4O6S2 formed by the action of sulfur trioxide on ethylene or alcohol
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Merriam-Webster unabridged