arachidonic acid

ar·a·chi·don·ic ac·id

[ar-uh-ki-don-ik, ar-]
noun Biochemistry.
an essential fatty acid, C 20 H 32 O 2 , 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

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World English Dictionary
arachidonic acid (ˌærəkəˈdɒnɪk) [Click for IPA pronunciation guide]
 
n
a fatty acid occurring in animal cells: the metabolic precursor of several groups of biologically active substances, including prostaglandins

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00:10
Arachidonic acid has a plethora of syllables.
So is antidisestablishmentarianism. Does it mean:
given to using long words.
opposition to the withdrawal of state support or recognition from an established church, esp. the Anglican Church in 19th-century England.
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
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