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Related to catechu: black catechu


(kăt`əcho͞o) or


extract from the heartwood of Acacia catechu, a leguminous tree of the pulsepulse,
in botany, common name for members of the Fabaceae (Leguminosae), a large plant family, called also the pea, or legume, family. Numbering about 650 genera and 17,000 species, the family is third largest, after the asters and the orchids.
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 family, native to India and Myanmar. Catechu is a fast brown dye used for various shades of brown and olive, including the familiar khaki, and also in tanning. White cutch is a synonym for gambier, a leaf extract of a shrub (Uncaria gambir) of the madder family, which is similarly used.



a substance obtained from the wood of the East Indian acacia (Acacia catechu) of the family Leguminosae (the plant is native to India and Sri Lanka). By boiling small pieces of the wood, an extract is obtained. After evaporation, the extract becomes a thick reddish brown mass. Catechu contains25–55 percent tannin. It dissolves in acetic acid and is precipi-tated from solution by sulfuric acid or gelatin. Catechu is usedto tan hides and, when oxidized by potassium bichromate, it isused as a dye for cotton and silk fabrics.

References in periodicals archive ?
01 (Ea) Control, without any extracts; SBT, sea buckthorn seed extract; GSE, grape seed extract; GTE, green tea extract; FSE, fenugreek seed extract; ACE, Acacia catechu extract.
Chopra RN et al reported that Acacia catechu is found in Punjab, Northeast Himalaya, Bihar and throughout Konkan region.
Painting in dyes of pomegranate rind, myrobalan, turmeric, black, catechu, babul bark, goran bark, madder and indigo with alum as mordant; 158 x 194 cm.
Most of the leguminous plants like Acacia catechu, Albizia lebbeck, Cassia alata, Lathyrus sativus, and Leucaena were used as forage for cattle feed.
In India betel quid preparation consist of half portion of a large betel leaf or medium small-sized betel leaves, smeared with slaked lime small amount of catechu to which is added few pieces of areca nut.
Resins from Uncaria gambier and Acacia catechu tannins were prepared by copolymerization with phenol and formaldehyde at 100[degrees]C.
The research team had introduced Thai Traditional Formula medicine (TTFM) in the treatment of helminthes and compared the efficacy and side effects among Mebendazole (500 mg) and Areca catechu Lin.
The betel nut is the seed of the Areca palm (Areca catechu L.
He said that even babies were indirectly exposed to hazards due to their mothers consumption of gutka and mainpuri concoctions of betel nuts, tobacco, lime, flavouring colourants, catechu and some other ingredients.
Por otro lado, en Areca catechu, subcultivos sucesivos en medio suplementado con dicamba llevaron a la formacion de embriones somaticos anormales (Wang et al.
Substantial amounts of reactive oxygen species like superoxide anion and hydrogen peroxide are produced in the oral cavity during chewing of areca nut and catechu at a pH greater than 9.
Tobacco has been chewed for centuries in India, most commonly as "paan" -- betel leaf with tobacco powder, areca nut, slaked lime and catechu (Acacia tree extract) -- or "paan masala", a flavoured variety with or without tobacco.