tannin
tan·nin
noun \ˈta-nən\Definition of TANNIN
1
: any of various soluble astringent complex phenolic substances of plant origin used especially in tanning leather and dyeing fabric, manufacturing ink, clarifying wine and beer, and in medicine
2
: a substance that has a tanning effect
See Origin of TANNIN
French, from tanner to tan
First Known Use: 1802
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