| A very minute proportion of quercetin, a principle yielded by quercitron bark, has been obtained from catechu. |
| When cubical gambir or catechu, in powder, is treated with cold water, a portion remains undissolved. |
| Allusion is to the custom of chewing betel leaves with catechu on such occasions of which the juice reddens the lips. |
| The nuts are then crushed with lime and catechu, a scarlet and astringent extract made by boiling chips of wood from the areca palm. |
| It consists of a dried paste that often includes tobacco, areca nuts, catechu, and scent or flavoring. |
| Extracts of areca catechu, rhus coppallina, diospyros virginiana, sassafrass albidium, and chenopodium ambrosiodes were found to produce tumors in rats. |
