Pharm. [L. TANNI(N + -GEN.] A compound of tannin and acetyl, used as an intestinal astringent; acetyl-tannin.

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1898.  in Syd. Soc. Lex.

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1905.  H. D. Rolleston, Dis. Liver, 297. If this [diarrhœa] is troublesome, bismuth, aromatic chalk and opium mixture, dilute sulphuric acid, tannigen … should be given.

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