pur·pu·ro·gal·lin
| \ ˌpərpyərōˈgalə̇n \
plural -s
Definition of purpurogallin
: a red crystalline phenolic ketone dye C11H4O(OH)4 that occurs naturally in various plant galls as the diglucoside and is made synthetically by oxidation of pyrogallol
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Merriam-Webster unabridged
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