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

Statistics for acid sludge

Look-up Popularity

Time Traveler for acid sludge

The first known use of acid sludge was in 1885

See more words from the same year

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).


to wander slowly or to speak indistinctly

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?

Add Diction

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!