arachidonic acid

ar·​a·​chi·​don·​ic acid | \ ˌa-rə-kə-ˈdä-nik- How to pronounce arachidonic acid (audio) , ˌer-ə- \

Definition of arachidonic acid

: a liquid unsaturated fatty acid C20H32O2 that occurs in most animal fats, is a precursor of prostaglandins, and is considered essential in animal nutrition

Examples of arachidonic acid in a Sentence

Recent Examples on the Web But the concentrations of vitamin A and arachidonic acid weren't even measured. Marta Zaraska,, "Be leery about vegetarian diets for your pets," 10 July 2019 There is arachidonic acid, an omega-6 fatty acid the body uses to make pro-inflammatory local hormones. Bryant Stamford, The Courier-Journal, "The high-fat keto diet isn't the worst for you, it's definitely not great either," 3 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'arachidonic acid.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of arachidonic acid

1913, in the meaning defined above

History and Etymology for arachidonic acid

New Latin Arachid-, Arachis + English -onic (as in gluconic acid)

Keep scrolling for more

Learn More about arachidonic acid

Time Traveler for arachidonic acid

Time Traveler

The first known use of arachidonic acid was in 1913

See more words from the same year

Statistics for arachidonic acid

Cite this Entry

“Arachidonic acid.” Dictionary, Merriam-Webster, Accessed 27 Nov. 2020.

Keep scrolling for more

More Definitions for arachidonic acid

arachidonic acid

ar·​a·​chi·​don·​ic acid | \ ˌar-ə-kə-ˌdän-ik- How to pronounce arachidonic acid (audio) \

Medical Definition of arachidonic acid

: a liquid unsaturated fatty acid C20H32O2 that occurs in most animal fats, is a precursor of prostaglandins and leukotrienes, and is considered essential in animal nutrition In a biological system for the regulation of various cell functions, arachidonic acid plays a unique role as a precursor molecule which is transformed into potent mediators with far-ranging effects.— Bengt Samuelsson, Science, 6 May 1983 The prostaglandins and the leukotrienes share a common origin. They are derived, by two different enzymatic pathways, from arachidonic acid, which is formed in cells whose cell membrane has been disrupted.— Paul D. Buisseret, Scientific American, August 1982 Fish and other vertebrates also rely on arachidonic acid, another fat, to make compounds for managing stress and immunity.— Janet Raloff, Science News, 13 May 2000 Pulmonary hypertension is thought to be due to activation and release of vasoactive mediators, including arachidonic acid metabolites, accompanied by diffuse pulmonary microvascular thrombosis— Harriet Kitzman et al., The Journal of the American Medical Association, 19 Apr. 2000 abbreviation AA, ARA

More from Merriam-Webster on arachidonic acid Encyclopedia article about arachidonic acid

Comments on arachidonic acid

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


Test Your Vocabulary

A Thanksgiving Word Quiz

  • a traditional thanksgiving dinner
  • November comes from a word for which of the following numbers?
Spell It

Can you spell these 10 commonly misspelled words?

Dictionary Devil

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!