indoleacetic acid

in·dole·a·ce·tic ac·id

[in-dohl-uh-see-tik, -set-ik, in-]
noun Biochemistry.
a crystalline, water-insoluble powder, C 10 H 9 NO 2 , a natural plant hormone, used especially for stimulating growth and root formation in plant cutting.


Origin:
1885–90; indole + acetic

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Collins
World English Dictionary
indoleacetic acid (ˌɪndəʊləˈsiːtɪk, -ˈsɛtɪk) [Click for IPA pronunciation guide]
 
n
IAA an auxin that causes elongation of the cells of plant stems. Formula: C10H9NO2

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Indoleacetic acid has a plethora of syllables.
So is supercalifragilisticexpialidocious. Does it mean:
(used as a nonsense word by children to express approval or to represent the longest word in English.)
the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
American Heritage
Medical Dictionary

indoleacetic acid in·dole·a·ce·tic acid (ĭn'dō-lə-sē'tĭk)
n.
A plant hormone that stimulates growth.

The American Heritage® Stedman's Medical Dictionary
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