arachidonic acid

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ar·a·chi·don·ic acid

 (ăr′ə-kĭ-dŏn′ĭk)
n.
An unsaturated fatty acid, C20H32O2, present in animal fats and synthesized by the body from linoleic acid, that is essential in human nutrition and is a precursor in the biosynthesis of some prostaglandins.

[From arachidic, of the groundnut, from New Latin Arachis, groundnut genus, from Greek arakis, arakid-, diminutive of arakos, a leguminous plant.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

arachidonic acid

(ˌærəkəˈdɒnɪk)
n
(Biochemistry) a fatty acid occurring in animal cells: the metabolic precursor of several groups of biologically active substances, including prostaglandins
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
Highly unsaturated fatty acid (HUFA), especially eicosatetraenoic acid (EPA) and docosahexaenoic acid (DHA), significantly accelerate gonad maturation (Lin and Zeng, 2006; Naessens et al., 1997; Laufer et al., 1998).
The abbreviations used for targeted analytes are as follows: PG, prostaglandin; HHTrE, hydroxy heptadecatrienoic acid; TX, thromboxane; EET, epoxy eicosatrienoic acid; DHET, dihydroxy eicosatrienoic acid; HETE, hydroxy eicosatetraenoic acid; DiHETE, dihydroxy eicosatetraenoic acid; EpOME, epoxy octadecenoic acid; DiHOME, dihydroxy octadecenoic acid; EPDPE, epoxy docosapentaenoic acid; DiHDPA, dihydroxy docosapentaenoic acid; HODE, hydroxy octadecadienoic acid; RvD2, resolvin D2; HDoHE, hydroxy docosahexaenoic acid; DiHDoHE, dihydroxy docosahexaenoic acid; HETrE, hydroxyl eicosatrienoic acid; HOTrE, hydroxy octadecatrienoic acid; and HEPE, hydroxy eicosapentaenoic acid.
Linseed oil affected the metabolism of fatty acids in the liver, increasing the activity of glucose-6-phosphate dehydrogenase and accumulation of C20:4 n-6 eicosatetraenoic acid. This was accompanied by a decrease in the concentrations of C20:5 n-3 eicosapentaenoic and C22:6 n-3 docosahexaenoic acid in fish muscle tissue.