Relating to or containing tannic acid derived from catechu; having the properties of catechuic acid or tannins from catechu extract.
From 'catechu' combined with 'tannic' (relating to tannin, from Medieval Latin 'tanninum'), creating a technical chemistry term for compounds derived from catechu.
Catechutannic acids were the reason catechu was so valuable—these tannins preserved leather and fixed dyes in fabric, making them worth trading across oceans before synthetic chemicals could replicate their properties.
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