catechu

不可数

A noun referring to an extract from the heartwood of the Acacia catechu tree, historically used in dyeing, tanning, and preserving fishnets and sails, as well as in traditional medicine.

• 🇨🇳指从儿茶树（Acacia catechu）心材中提取的浸膏，历史上用于染色、鞣革、防腐渔网和帆布，也用于传统医药。

1. Extract from heartwood C2 formal technical

   A brown, astringent extract obtained from the heartwood of the Acacia catechu tree, used historically in dyeing, tanning, preserving fishnets and sails, and in traditional medicine.

   • The fishermen used catechu to preserve their nets from rotting.
   • In traditional medicine, catechu was applied to treat digestive issues.
   • The tannery imported catechu for its high-quality tanning properties.

   🇨🇳儿茶提取物

   同义词: black catechucutch

2. Tree species C2 formal technical

   An East Indian spiny tree (Acacia catechu) with twice-pinnate leaves and yellow flowers, which produces flat pods and is the source of black catechu.

   • The catechu tree is native to parts of Asia and is valued for its wood.
   • Botanists studied the catechu tree for its unique bark properties.
   • The yellow flowers of the catechu tree bloom in the dry season.

   🇨🇳儿茶

   同义词: black catechu

• catechus plural form
• catechus' possessive plural form
• catechu's possessive singular form