tannal

Century Dictionary and Cyclopedia

1. n. A. trade-name of a basic aluminium tannate, Al₂(OH)₄(C₁₄H₉O₉)₂.10H₂O. It forms a brownish yellow powder and is used in surgery for dusting wounds.

Wiktionary

1. n. obsolete, medicine An aluminium salt of tannic acid (and sometimes also tartaric acid) used in various preparations