ricinoleic acid

noun Chemistry.
a colorless to yellow, viscous, liquid, water-insoluble, unsaturated hydroxyl acid, C 1 8 H 3 4 O 3 , occurring in castor oil in the form of the glyceride: used chiefly in soaps and textile finishing.

Origin:
1840–50

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ricinoleic acid (ˌrɪsɪnəʊˈliːɪk, -ˈnəʊlɪɪk)
 
n
1.  an oily unsaturated carboxylic acid found, as the glyceride, in castor oil and used in the manufacture of soap and in finishing textiles; 12-hydroxy-9-octadecanoic acid. Formula: C18H34O3
2.  the mixture of fatty acids obtained by hydrolysing castor oil
 
[C19: from ricin + oleic acid]

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Ricinoleic acid is an industrial useful compound with many applications.
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