ethionic acid

ethi·​on·​ic acid | \ ¦e|thē|¦änik-, ¦ē|, |ˌthī|\

Definition of ethionic acid

: an unstable diacid HO3SCH2CH2OSO3H known only in solution and obtainable by adding water to ethionic anhydride

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

First Known Use of ethionic acid

1844, in the meaning defined above

History and Etymology for ethionic acid

ethionic International Scientific Vocabulary e- (from ether) + -thion- (from Greek theion brimstone) + -ic

Keep scrolling for more

Learn More about ethionic acid

Statistics for ethionic acid

Look-up Popularity

Time Traveler for ethionic acid

The first known use of ethionic acid was in 1844

See more words from the same year

Comments on ethionic acid

What made you want to look up ethionic acid? Please tell us where you read or heard it (including the quote, if possible).


to fake an opponent out of position

Get Word of the Day daily email!

Test Your Vocabulary

Where in the World? A Quiz

  • peter bruegel tower of babel painting
  • What language does pajama come from?
Spell It

Can you spell these 10 commonly misspelled words?


Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!