arachidonic acid

[ar-uh-ki-don-ik, ar-]

ar·a·chi·don·ic ac·id

[ar-uh-ki-don-ik, ar-]
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:
1910–15; arachid(ic) + -onic
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Arachidonic acid is always a great word to know.
So is hafnium. Does it mean:
Symbol: Nd; atomic weight: 144.24; atomic number: 60
Symbol: Hf; atomic weight: 179.49; atomic number: 72
Collins
World English Dictionary
arachidonic acid (ˌærəkəˈdɒnɪk)
 
n
a fatty acid occurring in animal cells: the metabolic precursor of several groups of biologically active substances, including prostaglandins

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

arachidonic acid ar·a·chi·don·ic acid (ār'ə-kĭ-dŏn'ĭk)
n.
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.
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