East Indian spiny tree having twice-pinnate leaves and yellow flowers followed by flat pods; source of black catechu 同义词：Jerusalem thorn, Acacia catechu,
extract of the heartwood of Acacia catechu used for dyeing and tanning and preserving fishnets and sails; formerly used medicinally 同义词：black catechu,
Catechu ( or ) is an extract of Acacia used variously as a food additive, astringent, tannin, and dye. It is extracted from several species of Acacia, but especially Acacia catechu, by boiling the wood in water and evaporating the resulting brew.
例句与用法
1.
Results : borneolum yntheticum , catechu ould be identified by tlc 结果：在tlc色谱中可检出冰片、儿茶的特征斑点。
2.
Treatment of reflux esophagitis by combination therapy of capsule catechu compositae and cisapride 复方儿茶胶囊联合西沙比利治疗反流性食管炎的疗效
3.
Results : aphthae compound film of acaciae catechu and indigo naturalis has a good effect on treating rats dental ulcer 结果：儿茶、青黛口腔溃疡膜对实验性大鼠口腔溃疡疗效显著。
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