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5 definitions found
From: DICT.TW English-Chinese Medical Dictionary 英漢醫學字典
 tan·nic acid /ˌtænɪk-/ 名詞
From: Webster's Revised Unabridged Dictionary (1913)
 Tan·nic a. Of or pertaining to tan; derived from, or resembling, tan; as, tannic acid.
 Tannic acid. Chem. (a) 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. (b) By extension, any one of a series of astringent substances resembling tannin proper, widely diffused through the vegetable kingdom, as in oak bark, willow, catechu, tea, coffee, etc.
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From: Webster's Revised Unabridged Dictionary (1913)
 Tan·nin n.  Chem. Same as Tannic acid, under Tannic.
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From: Webster's Revised Unabridged Dictionary (1913)
 Gal·lo·tan·nic a.  Chem. Pertaining to the tannin or nutgalls.
 Gallotannic acid. See Tannic acid, under Tannic.
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From: WordNet (r) 2.0
 tannic acid
      n : any of various complex phenolic substances of plant origin;
          used in tanning and in medicine [syn: tannin]