A vegetable extract containing tannin, especially one (also called cutch) obtained from the heartwood of an Indian acacia tree, used chiefly for tanning and dyeing.
- ‘Gutkha is a mixture of areca, catechu, betel nut, lime, tobacco and mint.’
- ‘Nair et al. first demonstrated that aqueous extracts of areca nut and catechu were capable of generating superoxide anion and hydrogen peroxide at pH > 9.5.’
- ‘It consists of a dried paste that often includes tobacco, areca nuts, catechu, and scent or flavoring.’
- ‘Sprinkle on a little burnt lime with some catechu gum of a Malayan acacia tree and add a touch of nutmeg and cardamom for flavor.’
- ‘Extracts of areca catechu, rhus coppallina, diospyros virginiana, sassafrass albidium, and chenopodium ambrosiodes were found to produce tumors in rats.’
Late 17th century: modern Latin, from Malay kacu. Compare with cachou.