arachidonic acid

[ ar-uh-ki-don-ik, ar- ]
/ ˈær ə kɪˈdɒn ɪk, ˌær- /

noun Biochemistry.

an essential fatty acid, C20H32O2, found in the lipids of most tissues, that is a precursor in the synthesis of prostaglandins, prostacyclins, and related effectors.

Origin of arachidonic acid

First recorded in 1910–15; arachid(ic) + -onic Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for arachidonic acid

arachidonic acid

/ (ˌærəkəˈdɒnɪk) /


a fatty acid occurring in animal cells: the metabolic precursor of several groups of biologically active substances, including prostaglandins
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for arachidonic acid

arachidonic acid

[ ăr′ə-kĭ-dŏnĭk ]


An unsaturated fatty acid found in animal fats that is essential in human nutrition and is a precursor in the biosynthesis of some prostaglandins.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.