Definition of Catechu

Noun: catechu 'ka-tu,choo

Extract of the heartwood of Acacia catechu used for dyeing and tanning and preserving fishnets and sails; formerly used medicinally
- black catechu
East Indian spiny tree having twice-pinnate leaves and yellow flowers followed by flat pods; source of black catechu
- Jerusalem thorn, Acacia catechu