01 a. Of or pertaining to tan; derived from, or resembling, tan; as, tannic acid.
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1.
Of or pertaining to tan; derived from, or resembling, tan; as, tannic acid.
Phrases & compounds
Tannic acid —
An acid obtained from nutgalls as a yellow amorphous substance, C14H10O9, having an astringent taste, and forming with ferric salts a bluish-black compound, which is the basis of common ink. Called also tannin, and gallotannic acid.