catechin /'kætitʃin, -kin/ 📖 中文释义 [化] 儿茶素[医] 儿茶素, 儿茶酸 📘 English Definition(英文释义) n. a tannic acid that is extracted from black catechu as a white crystalline substance ← catechetics C 字母词表 catechinic tanning material →