black catechu

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Definitions from WordNet

Noun black catechu has 1 sense

black catechu, catechu - extract of the heartwood of Acacia catechu used for dying and tanning and preserving fishnets and sails; formerly used medicinally
--₁ is a kind of infusion, extract
--₁ is a substance of catechu, Jerusalem thorn, Acacia catechu

Definitions from the Web

Black Catechu

Definition: Black catechu, also known as cutch, is an extract derived from the heartwood of various acacia trees. It is often used for its astringent properties in medicine, dyeing, and tanning.

Examples:

Noun (Medicine): I used black catechu to treat my sore throat.

Noun (Dyeing): The textile industry utilizes black catechu as a natural dye to achieve rich, earthy shades.

Noun (Tanning): Leather artisans apply black catechu during the tanning process to enhance the durability and color of the leather.

Adjective: The black catechu extract has potent astringent properties.

Verb: You should black catechu the fabric before dyeing it.

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