acid radical


Definition of acid radical

1 : the negative ion (as the sulfate ion SO4−−) of an acid : anion now used especially by analysts
2 : a radical formed by removal of all hydroxyl or analogous groups (as mercapto) from an acid benzoyl C6H5CO− is the acid radical corresponding to benzoic acid C6H5COOH sulfuryl >SO2 is the acid radical of sulfuric acid H2SO4 — compare acyl

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 radical

1788, in the meaning defined at sense 1

Learn More About acid radical

Time Traveler for acid radical

Time Traveler

The first known use of acid radical was in 1788

See more words from the same year

Dictionary Entries Near acid radical

acid process

acid radical

acid rain

See More Nearby Entries 

Statistics for acid radical

Cite this Entry

“Acid radical.” Dictionary, Merriam-Webster, Accessed 2 Dec. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon


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?

Love words? Need even more definitions?

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