Noun has 2 senses

• catechu(n = noun.plant) black catechu - extract of the heartwood of Acacia catechu used for dyeing and tanning and preserving fishnets and sails; formerly used medicinally;



• catechu(n = noun.plant) acacia catechu, jerusalem thorn - East Indian spiny tree having twice-pinnate leaves and yellow flowers followed by flat pods; source of black catechu;