tannigenPharm.|ˈtænɪdʒɛn| [f. tannin + -gen.] A compound of tannin and acetyl, used as an intestinal astringent; acetyl-tannin. 1898in Syd. Soc.Lex.1905H. D. Rolleston Dis. Liver 297 If this [diarrhœa] is troublesome, bismuth, aromatic chalk and opium mixture, dilute sulphuric acid, tannigen..should be given.