acid sludge


Definition of acid sludge

: gummy material that separates from a petroleum oil on treatment with sulfuric acid

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 acid sludge

1885, in the meaning defined above

Keep scrolling for more

Learn More about acid sludge

Time Traveler for acid sludge

Time Traveler

The first known use of acid sludge was in 1885

See more words from the same year

Statistics for acid sludge

Cite this Entry

“Acid sludge.” Dictionary, Merriam-Webster, Accessed 22 Oct. 2020.

Comments on acid sludge

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


Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
Spell It

Can you spell these 10 commonly misspelled words?

Bee Cubed

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!