black catechu

1. East Indian spiny tree having twice-pinnate leaves and yellow flowers followed by flat pods; source of black catechu.
   东印度一种有刺乔木，两回羽状复叶，花黄色，荚扁平；是黑儿茶的来源。

noun

1. extract of the heartwood of Acacia catechu used for dyeing and tanning and preserving fishnets and sails

   Synonym:    catechu