acid number

noun

Definition of acid number 

: a measure of the amount of free acids (as fatty acids) in a substance (as an oil or resin) usually expressed as the number of milligrams of potassium hydroxide required to neutralize one gram of the substance

called also acid value

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 number

1886, in the meaning defined above

Keep scrolling for more

Learn More about acid number

Share acid number

Dictionary Entries near acid number

acidizer

acid jazz

acid man

acid number

acidoid

acidolysis

acidometer

Statistics for acid number

Look-up Popularity

Time Traveler for acid number

The first known use of acid number was in 1886

See more words from the same year

Comments on acid number

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

WORD OF THE DAY

exaggeratedly or childishly emotional

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ

Love words? Need even more definitions?

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