c1865 in Circ. Sc. I. 351/1*Tanno-caffeic acid, when roasted, develops the agreeable smell of coffee. 
1899 Allbutt's Syst. Med. VIII. 726Powders of *tannoform, salicylic acid, talc, bismuth, or lycopodium may be employed. 
1819 Brande Chem. 394The *tannogallate of iron is of the utmost importance, as forming the basis of writing ink, and of black dyes. 
1836 ― Chem. (ed. 4) 928Tannin forms a white precipitate in solution of gelatin (*tannogelatin), which, when carefully dried, becomes hard and tough. 
1877 Knight Dict. Mech. ,*Tannometer, a hydrometer for determining the proportion of tannin in tanning liquor. 
tanno-
— see tann-
— see tann-